LIB = $(obj)lib$(CPU).a
START = start.o start16.o resetvec.o
-COBJS = serial.o interrupts.o cpu.o timer.o sc520.o
-SOBJS = sc520_asm.o
+COBJS = serial.o interrupts.o cpu.o timer.o
SRCS := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS))
+++ /dev/null
-/*
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-/* stuff specific for the sc520,
- * but idependent of implementation */
-
-#include <config.h>
-#include <common.h>
-#include <config.h>
-#include <pci.h>
-#ifdef CONFIG_SC520_SSI
-#include <asm/ic/ssi.h>
-#endif
-#include <asm/io.h>
-#include <asm/pci.h>
-#include <asm/ic/sc520.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-/*
- * utility functions for boards based on the AMD sc520
- *
- * void write_mmcr_byte(u16 mmcr, u8 data)
- * void write_mmcr_word(u16 mmcr, u16 data)
- * void write_mmcr_long(u16 mmcr, u32 data)
- *
- * u8 read_mmcr_byte(u16 mmcr)
- * u16 read_mmcr_word(u16 mmcr)
- * u32 read_mmcr_long(u16 mmcr)
- *
- * void init_sc520(void)
- * unsigned long init_sc520_dram(void)
- * void pci_sc520_init(struct pci_controller *hose)
- *
- * void reset_timer(void)
- * ulong get_timer(ulong base)
- * void set_timer(ulong t)
- * void udelay(unsigned long usec)
- *
- */
-
-static u32 mmcr_base= 0xfffef000;
-
-void write_mmcr_byte(u16 mmcr, u8 data)
-{
- writeb(data, mmcr+mmcr_base);
-}
-
-void write_mmcr_word(u16 mmcr, u16 data)
-{
- writew(data, mmcr+mmcr_base);
-}
-
-void write_mmcr_long(u16 mmcr, u32 data)
-{
- writel(data, mmcr+mmcr_base);
-}
-
-u8 read_mmcr_byte(u16 mmcr)
-{
- return readb(mmcr+mmcr_base);
-}
-
-u16 read_mmcr_word(u16 mmcr)
-{
- return readw(mmcr+mmcr_base);
-}
-
-u32 read_mmcr_long(u16 mmcr)
-{
- return readl(mmcr+mmcr_base);
-}
-
-
-void init_sc520(void)
-{
- /* Set the UARTxCTL register at it's slower,
- * baud clock giving us a 1.8432 MHz reference
- */
- write_mmcr_byte(SC520_UART1CTL, 7);
- write_mmcr_byte(SC520_UART2CTL, 7);
-
- /* first set the timer pin mapping */
- write_mmcr_byte(SC520_CLKSEL, 0x72); /* no clock frequency selected, use 1.1892MHz */
-
- /* enable PCI bus arbitrer */
- write_mmcr_byte(SC520_SYSARBCTL,0x02); /* enable concurrent mode */
-
- write_mmcr_word(SC520_SYSARBMENB,0x1f); /* enable external grants */
- write_mmcr_word(SC520_HBCTL,0x04); /* enable posted-writes */
-
-
- if (CONFIG_SYS_SC520_HIGH_SPEED) {
- write_mmcr_byte(SC520_CPUCTL, 0x2); /* set it to 133 MHz and write back */
- gd->cpu_clk = 133000000;
- printf("## CPU Speed set to 133MHz\n");
- } else {
- write_mmcr_byte(SC520_CPUCTL, 1); /* set CPU to 100 MHz and write back cache */
- printf("## CPU Speed set to 100MHz\n");
- gd->cpu_clk = 100000000;
- }
-
-
- /* wait at least one millisecond */
- asm("movl $0x2000,%%ecx\n"
- "wait_loop: pushl %%ecx\n"
- "popl %%ecx\n"
- "loop wait_loop\n": : : "ecx");
-
- /* turn on the SDRAM write buffer */
- write_mmcr_byte(SC520_DBCTL, 0x11);
-
- /* turn on the cache and disable write through */
- asm("movl %%cr0, %%eax\n"
- "andl $0x9fffffff, %%eax\n"
- "movl %%eax, %%cr0\n" : : : "eax");
-}
-
-unsigned long init_sc520_dram(void)
-{
- bd_t *bd = gd->bd;
-
- u32 dram_present=0;
- u32 dram_ctrl;
-#ifdef CONFIG_SYS_SDRAM_DRCTMCTL
- /* these memory control registers are set up in the assember part,
- * in sc520_asm.S, during 'mem_init'. If we muck with them here,
- * after we are running a stack in RAM, we have troubles. Besides,
- * these refresh and delay values are better ? simply specified
- * outright in the include/configs/{cfg} file since the HW designer
- * simply dictates it.
- */
-#else
- int val;
-
- int cas_precharge_delay = CONFIG_SYS_SDRAM_PRECHARGE_DELAY;
- int refresh_rate = CONFIG_SYS_SDRAM_REFRESH_RATE;
- int ras_cas_delay = CONFIG_SYS_SDRAM_RAS_CAS_DELAY;
-
- /* set SDRAM speed here */
-
- refresh_rate/=78;
- if (refresh_rate<=1) {
- val = 0; /* 7.8us */
- } else if (refresh_rate==2) {
- val = 1; /* 15.6us */
- } else if (refresh_rate==3 || refresh_rate==4) {
- val = 2; /* 31.2us */
- } else {
- val = 3; /* 62.4us */
- }
-
- write_mmcr_byte(SC520_DRCCTL, (read_mmcr_byte(SC520_DRCCTL) & 0xcf) | (val<<4));
-
- val = read_mmcr_byte(SC520_DRCTMCTL);
- val &= 0xf0;
-
- if (cas_precharge_delay==3) {
- val |= 0x04; /* 3T */
- } else if (cas_precharge_delay==4) {
- val |= 0x08; /* 4T */
- } else if (cas_precharge_delay>4) {
- val |= 0x0c;
- }
-
- if (ras_cas_delay > 3) {
- val |= 2;
- } else {
- val |= 1;
- }
- write_mmcr_byte(SC520_DRCTMCTL, val);
-#endif
-
- /* We read-back the configuration of the dram
- * controller that the assembly code wrote */
- dram_ctrl = read_mmcr_long(SC520_DRCBENDADR);
-
- bd->bi_dram[0].start = 0;
- if (dram_ctrl & 0x80) {
- /* bank 0 enabled */
- dram_present = bd->bi_dram[1].start = (dram_ctrl & 0x7f) << 22;
- bd->bi_dram[0].size = bd->bi_dram[1].start;
-
- } else {
- bd->bi_dram[0].size = 0;
- bd->bi_dram[1].start = bd->bi_dram[0].start;
- }
-
- if (dram_ctrl & 0x8000) {
- /* bank 1 enabled */
- dram_present = bd->bi_dram[2].start = (dram_ctrl & 0x7f00) << 14;
- bd->bi_dram[1].size = bd->bi_dram[2].start - bd->bi_dram[1].start;
- } else {
- bd->bi_dram[1].size = 0;
- bd->bi_dram[2].start = bd->bi_dram[1].start;
- }
-
- if (dram_ctrl & 0x800000) {
- /* bank 2 enabled */
- dram_present = bd->bi_dram[3].start = (dram_ctrl & 0x7f0000) << 6;
- bd->bi_dram[2].size = bd->bi_dram[3].start - bd->bi_dram[2].start;
- } else {
- bd->bi_dram[2].size = 0;
- bd->bi_dram[3].start = bd->bi_dram[2].start;
- }
-
- if (dram_ctrl & 0x80000000) {
- /* bank 3 enabled */
- dram_present = (dram_ctrl & 0x7f000000) >> 2;
- bd->bi_dram[3].size = dram_present - bd->bi_dram[3].start;
- } else {
- bd->bi_dram[3].size = 0;
- }
-
-
-#if 0
- printf("Configured %d bytes of dram\n", dram_present);
-#endif
- gd->ram_size = dram_present;
-
- return dram_present;
-}
-
-
-#ifdef CONFIG_PCI
-
-
-static struct {
- u8 priority;
- u16 level_reg;
- u8 level_bit;
-} sc520_irq[] = {
- { SC520_IRQ0, SC520_MPICMODE, 0x01 },
- { SC520_IRQ1, SC520_MPICMODE, 0x02 },
- { SC520_IRQ2, SC520_SL1PICMODE, 0x02 },
- { SC520_IRQ3, SC520_MPICMODE, 0x08 },
- { SC520_IRQ4, SC520_MPICMODE, 0x10 },
- { SC520_IRQ5, SC520_MPICMODE, 0x20 },
- { SC520_IRQ6, SC520_MPICMODE, 0x40 },
- { SC520_IRQ7, SC520_MPICMODE, 0x80 },
-
- { SC520_IRQ8, SC520_SL1PICMODE, 0x01 },
- { SC520_IRQ9, SC520_SL1PICMODE, 0x02 },
- { SC520_IRQ10, SC520_SL1PICMODE, 0x04 },
- { SC520_IRQ11, SC520_SL1PICMODE, 0x08 },
- { SC520_IRQ12, SC520_SL1PICMODE, 0x10 },
- { SC520_IRQ13, SC520_SL1PICMODE, 0x20 },
- { SC520_IRQ14, SC520_SL1PICMODE, 0x40 },
- { SC520_IRQ15, SC520_SL1PICMODE, 0x80 }
-};
-
-
-/* The interrupt used for PCI INTA-INTD */
-int sc520_pci_ints[15] = {
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1
-};
-
-/* utility function to configure a pci interrupt */
-int pci_sc520_set_irq(int pci_pin, int irq)
-{
- int i;
-
-# if 1
- printf("set_irq(): map INT%c to IRQ%d\n", pci_pin + 'A', irq);
-#endif
- if (irq < 0 || irq > 15) {
- return -1; /* illegal irq */
- }
-
- if (pci_pin < 0 || pci_pin > 15) {
- return -1; /* illegal pci int pin */
- }
-
- /* first disable any non-pci interrupt source that use
- * this level */
- for (i=SC520_GPTMR0MAP;i<=SC520_GP10IMAP;i++) {
- if (i>=SC520_PCIINTAMAP&&i<=SC520_PCIINTDMAP) {
- continue;
- }
- if (read_mmcr_byte(i) == sc520_irq[irq].priority) {
- write_mmcr_byte(i, SC520_IRQ_DISABLED);
- }
- }
-
- /* Set the trigger to level */
- write_mmcr_byte(sc520_irq[irq].level_reg,
- read_mmcr_byte(sc520_irq[irq].level_reg) | sc520_irq[irq].level_bit);
-
-
- if (pci_pin < 4) {
- /* PCI INTA-INTD */
- /* route the interrupt */
- write_mmcr_byte(SC520_PCIINTAMAP + pci_pin, sc520_irq[irq].priority);
-
-
- } else {
- /* GPIRQ0-GPIRQ10 used for additional PCI INTS */
- write_mmcr_byte(SC520_GP0IMAP + pci_pin - 4, sc520_irq[irq].priority);
-
- /* also set the polarity in this case */
- write_mmcr_word(SC520_INTPINPOL,
- read_mmcr_word(SC520_INTPINPOL) | (1 << (pci_pin-4)));
-
- }
-
- /* register the pin */
- sc520_pci_ints[pci_pin] = irq;
-
-
- return 0; /* OK */
-}
-
-void pci_sc520_init(struct pci_controller *hose)
-{
- hose->first_busno = 0;
- hose->last_busno = 0xff;
-
- /* System memory space */
- pci_set_region(hose->regions + 0,
- SC520_PCI_MEMORY_BUS,
- SC520_PCI_MEMORY_PHYS,
- SC520_PCI_MEMORY_SIZE,
- PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
-
- /* PCI memory space */
- pci_set_region(hose->regions + 1,
- SC520_PCI_MEM_BUS,
- SC520_PCI_MEM_PHYS,
- SC520_PCI_MEM_SIZE,
- PCI_REGION_MEM);
-
- /* ISA/PCI memory space */
- pci_set_region(hose->regions + 2,
- SC520_ISA_MEM_BUS,
- SC520_ISA_MEM_PHYS,
- SC520_ISA_MEM_SIZE,
- PCI_REGION_MEM);
-
- /* PCI I/O space */
- pci_set_region(hose->regions + 3,
- SC520_PCI_IO_BUS,
- SC520_PCI_IO_PHYS,
- SC520_PCI_IO_SIZE,
- PCI_REGION_IO);
-
- /* ISA/PCI I/O space */
- pci_set_region(hose->regions + 4,
- SC520_ISA_IO_BUS,
- SC520_ISA_IO_PHYS,
- SC520_ISA_IO_SIZE,
- PCI_REGION_IO);
-
- hose->region_count = 5;
-
- pci_setup_type1(hose,
- SC520_REG_ADDR,
- SC520_REG_DATA);
-
- pci_register_hose(hose);
-
- hose->last_busno = pci_hose_scan(hose);
-
- /* enable target memory acceses on host brige */
- pci_write_config_word(0, PCI_COMMAND,
- PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
-
-}
-
-
-#endif
-
-#ifdef CONFIG_SYS_TIMER_SC520
-
-
-void reset_timer(void)
-{
- write_mmcr_word(SC520_GPTMR0CNT, 0);
- write_mmcr_word(SC520_GPTMR0CTL, 0x6001);
-
-}
-
-ulong get_timer(ulong base)
-{
- /* fixme: 30 or 33 */
- return read_mmcr_word(SC520_GPTMR0CNT) / 33;
-}
-
-void set_timer(ulong t)
-{
- /* FixMe: use two cascade coupled timers */
- write_mmcr_word(SC520_GPTMR0CTL, 0x4001);
- write_mmcr_word(SC520_GPTMR0CNT, t*33);
- write_mmcr_word(SC520_GPTMR0CTL, 0x6001);
-}
-
-
-void udelay(unsigned long usec)
-{
- int m=0;
- long u;
-
- read_mmcr_word(SC520_SWTMRMILLI);
- read_mmcr_word(SC520_SWTMRMICRO);
-
-#if 0
- /* do not enable this line, udelay is used in the serial driver -> recursion */
- printf("udelay: %ld m.u %d.%d tm.tu %d.%d\n", usec, m, u, tm, tu);
-#endif
- while (1) {
-
- m += read_mmcr_word(SC520_SWTMRMILLI);
- u = read_mmcr_word(SC520_SWTMRMICRO) + (m * 1000);
-
- if (usec <= u) {
- break;
- }
- }
-}
-
-#endif
-
-int ssi_set_interface(int freq, int lsb_first, int inv_clock, int inv_phase)
-{
- u8 temp=0;
-
- if (freq >= 8192) {
- temp |= CTL_CLK_SEL_4;
- } else if (freq >= 4096) {
- temp |= CTL_CLK_SEL_8;
- } else if (freq >= 2048) {
- temp |= CTL_CLK_SEL_16;
- } else if (freq >= 1024) {
- temp |= CTL_CLK_SEL_32;
- } else if (freq >= 512) {
- temp |= CTL_CLK_SEL_64;
- } else if (freq >= 256) {
- temp |= CTL_CLK_SEL_128;
- } else if (freq >= 128) {
- temp |= CTL_CLK_SEL_256;
- } else {
- temp |= CTL_CLK_SEL_512;
- }
-
- if (!lsb_first) {
- temp |= MSBF_ENB;
- }
-
- if (inv_clock) {
- temp |= CLK_INV_ENB;
- }
-
- if (inv_phase) {
- temp |= PHS_INV_ENB;
- }
-
- write_mmcr_byte(SC520_SSICTL, temp);
-
- return 0;
-}
-
-u8 ssi_txrx_byte(u8 data)
-{
- write_mmcr_byte(SC520_SSIXMIT, data);
- while ((read_mmcr_byte(SC520_SSISTA)) & SSISTA_BSY);
- write_mmcr_byte(SC520_SSICMD, SSICMD_CMD_SEL_XMITRCV);
- while ((read_mmcr_byte(SC520_SSISTA)) & SSISTA_BSY);
- return read_mmcr_byte(SC520_SSIRCV);
-}
-
-
-void ssi_tx_byte(u8 data)
-{
- write_mmcr_byte(SC520_SSIXMIT, data);
- while ((read_mmcr_byte(SC520_SSISTA)) & SSISTA_BSY);
- write_mmcr_byte(SC520_SSICMD, SSICMD_CMD_SEL_XMIT);
-}
-
-u8 ssi_rx_byte(void)
-{
- while ((read_mmcr_byte(SC520_SSISTA)) & SSISTA_BSY);
- write_mmcr_byte(SC520_SSICMD, SSICMD_CMD_SEL_RCV);
- while ((read_mmcr_byte(SC520_SSISTA)) & SSISTA_BSY);
- return read_mmcr_byte(SC520_SSIRCV);
-}
-
-#ifdef CONFIG_SYS_RESET_SC520
-void reset_cpu(ulong addr)
-{
- printf("Resetting using SC520 MMCR\n");
- /* Write a '1' to the SYS_RST of the RESCFG MMCR */
- write_mmcr_word(SC520_RESCFG, 0x0001);
-
- /* NOTREACHED */
-}
-#endif
--- /dev/null
+#
+# (C) Copyright 2008
+# Graeme Russ, graeme.russ@gmail.com.
+#
+# (C) Copyright 2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2002
+# Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB := $(obj)lib$(SOC).a
+
+COBJS-$(CONFIG_SYS_SC520) += sc520.o
+SOBJS-$(CONFIG_SYS_SC520) += sc520_asm.o
+
+SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
+OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
+
+all: $(obj).depend $(LIB)
+
+$(LIB): $(OBJS)
+ $(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
\ No newline at end of file
--- /dev/null
+/*
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/* stuff specific for the sc520,
+ * but idependent of implementation */
+
+#include <config.h>
+#include <common.h>
+#include <config.h>
+#include <pci.h>
+#ifdef CONFIG_SC520_SSI
+#include <asm/ic/ssi.h>
+#endif
+#include <asm/io.h>
+#include <asm/pci.h>
+#include <asm/ic/sc520.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * utility functions for boards based on the AMD sc520
+ *
+ * void write_mmcr_byte(u16 mmcr, u8 data)
+ * void write_mmcr_word(u16 mmcr, u16 data)
+ * void write_mmcr_long(u16 mmcr, u32 data)
+ *
+ * u8 read_mmcr_byte(u16 mmcr)
+ * u16 read_mmcr_word(u16 mmcr)
+ * u32 read_mmcr_long(u16 mmcr)
+ *
+ * void init_sc520(void)
+ * unsigned long init_sc520_dram(void)
+ * void pci_sc520_init(struct pci_controller *hose)
+ *
+ * void reset_timer(void)
+ * ulong get_timer(ulong base)
+ * void set_timer(ulong t)
+ * void udelay(unsigned long usec)
+ *
+ */
+
+static u32 mmcr_base= 0xfffef000;
+
+void write_mmcr_byte(u16 mmcr, u8 data)
+{
+ writeb(data, mmcr+mmcr_base);
+}
+
+void write_mmcr_word(u16 mmcr, u16 data)
+{
+ writew(data, mmcr+mmcr_base);
+}
+
+void write_mmcr_long(u16 mmcr, u32 data)
+{
+ writel(data, mmcr+mmcr_base);
+}
+
+u8 read_mmcr_byte(u16 mmcr)
+{
+ return readb(mmcr+mmcr_base);
+}
+
+u16 read_mmcr_word(u16 mmcr)
+{
+ return readw(mmcr+mmcr_base);
+}
+
+u32 read_mmcr_long(u16 mmcr)
+{
+ return readl(mmcr+mmcr_base);
+}
+
+
+void init_sc520(void)
+{
+ /* Set the UARTxCTL register at it's slower,
+ * baud clock giving us a 1.8432 MHz reference
+ */
+ write_mmcr_byte(SC520_UART1CTL, 7);
+ write_mmcr_byte(SC520_UART2CTL, 7);
+
+ /* first set the timer pin mapping */
+ write_mmcr_byte(SC520_CLKSEL, 0x72); /* no clock frequency selected, use 1.1892MHz */
+
+ /* enable PCI bus arbitrer */
+ write_mmcr_byte(SC520_SYSARBCTL,0x02); /* enable concurrent mode */
+
+ write_mmcr_word(SC520_SYSARBMENB,0x1f); /* enable external grants */
+ write_mmcr_word(SC520_HBCTL,0x04); /* enable posted-writes */
+
+
+ if (CONFIG_SYS_SC520_HIGH_SPEED) {
+ write_mmcr_byte(SC520_CPUCTL, 0x2); /* set it to 133 MHz and write back */
+ gd->cpu_clk = 133000000;
+ printf("## CPU Speed set to 133MHz\n");
+ } else {
+ write_mmcr_byte(SC520_CPUCTL, 1); /* set CPU to 100 MHz and write back cache */
+ printf("## CPU Speed set to 100MHz\n");
+ gd->cpu_clk = 100000000;
+ }
+
+
+ /* wait at least one millisecond */
+ asm("movl $0x2000,%%ecx\n"
+ "wait_loop: pushl %%ecx\n"
+ "popl %%ecx\n"
+ "loop wait_loop\n": : : "ecx");
+
+ /* turn on the SDRAM write buffer */
+ write_mmcr_byte(SC520_DBCTL, 0x11);
+
+ /* turn on the cache and disable write through */
+ asm("movl %%cr0, %%eax\n"
+ "andl $0x9fffffff, %%eax\n"
+ "movl %%eax, %%cr0\n" : : : "eax");
+}
+
+unsigned long init_sc520_dram(void)
+{
+ bd_t *bd = gd->bd;
+
+ u32 dram_present=0;
+ u32 dram_ctrl;
+#ifdef CONFIG_SYS_SDRAM_DRCTMCTL
+ /* these memory control registers are set up in the assember part,
+ * in sc520_asm.S, during 'mem_init'. If we muck with them here,
+ * after we are running a stack in RAM, we have troubles. Besides,
+ * these refresh and delay values are better ? simply specified
+ * outright in the include/configs/{cfg} file since the HW designer
+ * simply dictates it.
+ */
+#else
+ int val;
+
+ int cas_precharge_delay = CONFIG_SYS_SDRAM_PRECHARGE_DELAY;
+ int refresh_rate = CONFIG_SYS_SDRAM_REFRESH_RATE;
+ int ras_cas_delay = CONFIG_SYS_SDRAM_RAS_CAS_DELAY;
+
+ /* set SDRAM speed here */
+
+ refresh_rate/=78;
+ if (refresh_rate<=1) {
+ val = 0; /* 7.8us */
+ } else if (refresh_rate==2) {
+ val = 1; /* 15.6us */
+ } else if (refresh_rate==3 || refresh_rate==4) {
+ val = 2; /* 31.2us */
+ } else {
+ val = 3; /* 62.4us */
+ }
+
+ write_mmcr_byte(SC520_DRCCTL, (read_mmcr_byte(SC520_DRCCTL) & 0xcf) | (val<<4));
+
+ val = read_mmcr_byte(SC520_DRCTMCTL);
+ val &= 0xf0;
+
+ if (cas_precharge_delay==3) {
+ val |= 0x04; /* 3T */
+ } else if (cas_precharge_delay==4) {
+ val |= 0x08; /* 4T */
+ } else if (cas_precharge_delay>4) {
+ val |= 0x0c;
+ }
+
+ if (ras_cas_delay > 3) {
+ val |= 2;
+ } else {
+ val |= 1;
+ }
+ write_mmcr_byte(SC520_DRCTMCTL, val);
+#endif
+
+ /* We read-back the configuration of the dram
+ * controller that the assembly code wrote */
+ dram_ctrl = read_mmcr_long(SC520_DRCBENDADR);
+
+ bd->bi_dram[0].start = 0;
+ if (dram_ctrl & 0x80) {
+ /* bank 0 enabled */
+ dram_present = bd->bi_dram[1].start = (dram_ctrl & 0x7f) << 22;
+ bd->bi_dram[0].size = bd->bi_dram[1].start;
+
+ } else {
+ bd->bi_dram[0].size = 0;
+ bd->bi_dram[1].start = bd->bi_dram[0].start;
+ }
+
+ if (dram_ctrl & 0x8000) {
+ /* bank 1 enabled */
+ dram_present = bd->bi_dram[2].start = (dram_ctrl & 0x7f00) << 14;
+ bd->bi_dram[1].size = bd->bi_dram[2].start - bd->bi_dram[1].start;
+ } else {
+ bd->bi_dram[1].size = 0;
+ bd->bi_dram[2].start = bd->bi_dram[1].start;
+ }
+
+ if (dram_ctrl & 0x800000) {
+ /* bank 2 enabled */
+ dram_present = bd->bi_dram[3].start = (dram_ctrl & 0x7f0000) << 6;
+ bd->bi_dram[2].size = bd->bi_dram[3].start - bd->bi_dram[2].start;
+ } else {
+ bd->bi_dram[2].size = 0;
+ bd->bi_dram[3].start = bd->bi_dram[2].start;
+ }
+
+ if (dram_ctrl & 0x80000000) {
+ /* bank 3 enabled */
+ dram_present = (dram_ctrl & 0x7f000000) >> 2;
+ bd->bi_dram[3].size = dram_present - bd->bi_dram[3].start;
+ } else {
+ bd->bi_dram[3].size = 0;
+ }
+
+
+#if 0
+ printf("Configured %d bytes of dram\n", dram_present);
+#endif
+ gd->ram_size = dram_present;
+
+ return dram_present;
+}
+
+
+#ifdef CONFIG_PCI
+
+
+static struct {
+ u8 priority;
+ u16 level_reg;
+ u8 level_bit;
+} sc520_irq[] = {
+ { SC520_IRQ0, SC520_MPICMODE, 0x01 },
+ { SC520_IRQ1, SC520_MPICMODE, 0x02 },
+ { SC520_IRQ2, SC520_SL1PICMODE, 0x02 },
+ { SC520_IRQ3, SC520_MPICMODE, 0x08 },
+ { SC520_IRQ4, SC520_MPICMODE, 0x10 },
+ { SC520_IRQ5, SC520_MPICMODE, 0x20 },
+ { SC520_IRQ6, SC520_MPICMODE, 0x40 },
+ { SC520_IRQ7, SC520_MPICMODE, 0x80 },
+
+ { SC520_IRQ8, SC520_SL1PICMODE, 0x01 },
+ { SC520_IRQ9, SC520_SL1PICMODE, 0x02 },
+ { SC520_IRQ10, SC520_SL1PICMODE, 0x04 },
+ { SC520_IRQ11, SC520_SL1PICMODE, 0x08 },
+ { SC520_IRQ12, SC520_SL1PICMODE, 0x10 },
+ { SC520_IRQ13, SC520_SL1PICMODE, 0x20 },
+ { SC520_IRQ14, SC520_SL1PICMODE, 0x40 },
+ { SC520_IRQ15, SC520_SL1PICMODE, 0x80 }
+};
+
+
+/* The interrupt used for PCI INTA-INTD */
+int sc520_pci_ints[15] = {
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1
+};
+
+/* utility function to configure a pci interrupt */
+int pci_sc520_set_irq(int pci_pin, int irq)
+{
+ int i;
+
+# if 1
+ printf("set_irq(): map INT%c to IRQ%d\n", pci_pin + 'A', irq);
+#endif
+ if (irq < 0 || irq > 15) {
+ return -1; /* illegal irq */
+ }
+
+ if (pci_pin < 0 || pci_pin > 15) {
+ return -1; /* illegal pci int pin */
+ }
+
+ /* first disable any non-pci interrupt source that use
+ * this level */
+ for (i=SC520_GPTMR0MAP;i<=SC520_GP10IMAP;i++) {
+ if (i>=SC520_PCIINTAMAP&&i<=SC520_PCIINTDMAP) {
+ continue;
+ }
+ if (read_mmcr_byte(i) == sc520_irq[irq].priority) {
+ write_mmcr_byte(i, SC520_IRQ_DISABLED);
+ }
+ }
+
+ /* Set the trigger to level */
+ write_mmcr_byte(sc520_irq[irq].level_reg,
+ read_mmcr_byte(sc520_irq[irq].level_reg) | sc520_irq[irq].level_bit);
+
+
+ if (pci_pin < 4) {
+ /* PCI INTA-INTD */
+ /* route the interrupt */
+ write_mmcr_byte(SC520_PCIINTAMAP + pci_pin, sc520_irq[irq].priority);
+
+
+ } else {
+ /* GPIRQ0-GPIRQ10 used for additional PCI INTS */
+ write_mmcr_byte(SC520_GP0IMAP + pci_pin - 4, sc520_irq[irq].priority);
+
+ /* also set the polarity in this case */
+ write_mmcr_word(SC520_INTPINPOL,
+ read_mmcr_word(SC520_INTPINPOL) | (1 << (pci_pin-4)));
+
+ }
+
+ /* register the pin */
+ sc520_pci_ints[pci_pin] = irq;
+
+
+ return 0; /* OK */
+}
+
+void pci_sc520_init(struct pci_controller *hose)
+{
+ hose->first_busno = 0;
+ hose->last_busno = 0xff;
+
+ /* System memory space */
+ pci_set_region(hose->regions + 0,
+ SC520_PCI_MEMORY_BUS,
+ SC520_PCI_MEMORY_PHYS,
+ SC520_PCI_MEMORY_SIZE,
+ PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
+
+ /* PCI memory space */
+ pci_set_region(hose->regions + 1,
+ SC520_PCI_MEM_BUS,
+ SC520_PCI_MEM_PHYS,
+ SC520_PCI_MEM_SIZE,
+ PCI_REGION_MEM);
+
+ /* ISA/PCI memory space */
+ pci_set_region(hose->regions + 2,
+ SC520_ISA_MEM_BUS,
+ SC520_ISA_MEM_PHYS,
+ SC520_ISA_MEM_SIZE,
+ PCI_REGION_MEM);
+
+ /* PCI I/O space */
+ pci_set_region(hose->regions + 3,
+ SC520_PCI_IO_BUS,
+ SC520_PCI_IO_PHYS,
+ SC520_PCI_IO_SIZE,
+ PCI_REGION_IO);
+
+ /* ISA/PCI I/O space */
+ pci_set_region(hose->regions + 4,
+ SC520_ISA_IO_BUS,
+ SC520_ISA_IO_PHYS,
+ SC520_ISA_IO_SIZE,
+ PCI_REGION_IO);
+
+ hose->region_count = 5;
+
+ pci_setup_type1(hose,
+ SC520_REG_ADDR,
+ SC520_REG_DATA);
+
+ pci_register_hose(hose);
+
+ hose->last_busno = pci_hose_scan(hose);
+
+ /* enable target memory acceses on host brige */
+ pci_write_config_word(0, PCI_COMMAND,
+ PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+
+}
+
+
+#endif
+
+#ifdef CONFIG_SYS_TIMER_SC520
+
+
+void reset_timer(void)
+{
+ write_mmcr_word(SC520_GPTMR0CNT, 0);
+ write_mmcr_word(SC520_GPTMR0CTL, 0x6001);
+
+}
+
+ulong get_timer(ulong base)
+{
+ /* fixme: 30 or 33 */
+ return read_mmcr_word(SC520_GPTMR0CNT) / 33;
+}
+
+void set_timer(ulong t)
+{
+ /* FixMe: use two cascade coupled timers */
+ write_mmcr_word(SC520_GPTMR0CTL, 0x4001);
+ write_mmcr_word(SC520_GPTMR0CNT, t*33);
+ write_mmcr_word(SC520_GPTMR0CTL, 0x6001);
+}
+
+
+void udelay(unsigned long usec)
+{
+ int m=0;
+ long u;
+
+ read_mmcr_word(SC520_SWTMRMILLI);
+ read_mmcr_word(SC520_SWTMRMICRO);
+
+#if 0
+ /* do not enable this line, udelay is used in the serial driver -> recursion */
+ printf("udelay: %ld m.u %d.%d tm.tu %d.%d\n", usec, m, u, tm, tu);
+#endif
+ while (1) {
+
+ m += read_mmcr_word(SC520_SWTMRMILLI);
+ u = read_mmcr_word(SC520_SWTMRMICRO) + (m * 1000);
+
+ if (usec <= u) {
+ break;
+ }
+ }
+}
+
+#endif
+
+int ssi_set_interface(int freq, int lsb_first, int inv_clock, int inv_phase)
+{
+ u8 temp=0;
+
+ if (freq >= 8192) {
+ temp |= CTL_CLK_SEL_4;
+ } else if (freq >= 4096) {
+ temp |= CTL_CLK_SEL_8;
+ } else if (freq >= 2048) {
+ temp |= CTL_CLK_SEL_16;
+ } else if (freq >= 1024) {
+ temp |= CTL_CLK_SEL_32;
+ } else if (freq >= 512) {
+ temp |= CTL_CLK_SEL_64;
+ } else if (freq >= 256) {
+ temp |= CTL_CLK_SEL_128;
+ } else if (freq >= 128) {
+ temp |= CTL_CLK_SEL_256;
+ } else {
+ temp |= CTL_CLK_SEL_512;
+ }
+
+ if (!lsb_first) {
+ temp |= MSBF_ENB;
+ }
+
+ if (inv_clock) {
+ temp |= CLK_INV_ENB;
+ }
+
+ if (inv_phase) {
+ temp |= PHS_INV_ENB;
+ }
+
+ write_mmcr_byte(SC520_SSICTL, temp);
+
+ return 0;
+}
+
+u8 ssi_txrx_byte(u8 data)
+{
+ write_mmcr_byte(SC520_SSIXMIT, data);
+ while ((read_mmcr_byte(SC520_SSISTA)) & SSISTA_BSY);
+ write_mmcr_byte(SC520_SSICMD, SSICMD_CMD_SEL_XMITRCV);
+ while ((read_mmcr_byte(SC520_SSISTA)) & SSISTA_BSY);
+ return read_mmcr_byte(SC520_SSIRCV);
+}
+
+
+void ssi_tx_byte(u8 data)
+{
+ write_mmcr_byte(SC520_SSIXMIT, data);
+ while ((read_mmcr_byte(SC520_SSISTA)) & SSISTA_BSY);
+ write_mmcr_byte(SC520_SSICMD, SSICMD_CMD_SEL_XMIT);
+}
+
+u8 ssi_rx_byte(void)
+{
+ while ((read_mmcr_byte(SC520_SSISTA)) & SSISTA_BSY);
+ write_mmcr_byte(SC520_SSICMD, SSICMD_CMD_SEL_RCV);
+ while ((read_mmcr_byte(SC520_SSISTA)) & SSISTA_BSY);
+ return read_mmcr_byte(SC520_SSIRCV);
+}
+
+#ifdef CONFIG_SYS_RESET_SC520
+void reset_cpu(ulong addr)
+{
+ printf("Resetting using SC520 MMCR\n");
+ /* Write a '1' to the SYS_RST of the RESCFG MMCR */
+ write_mmcr_word(SC520_RESCFG, 0x0001);
+
+ /* NOTREACHED */
+}
+#endif
--- /dev/null
+/*
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/* This file is largely based on code obtned from AMD. AMD's original
+ * copyright is included below
+ */
+
+/*
+ * =============================================================================
+ *
+ * Copyright 1999 Advanced Micro Devices, Inc.
+ *
+ * This software is the property of Advanced Micro Devices, Inc (AMD) which
+ * specifically grants the user the right to modify, use and distribute this
+ * software provided this COPYRIGHT NOTICE is not removed or altered. All
+ * other rights are reserved by AMD.
+ *
+ * THE MATERIALS ARE PROVIDED "AS IS" WITHOUT ANY EXPRESS OR IMPLIED WARRANTY
+ * OF ANY KIND INCLUDING WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT OF
+ * THIRD-PARTY INTELLECTUAL PROPERTY, OR FITNESS FOR ANY PARTICULAR PURPOSE.
+ * IN NO EVENT SHALL AMD OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER
+ * (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS
+ * INTERRUPTION, LOSS OF INFORMAITON) ARISING OUT OF THE USE OF OR INABILITY
+ * TO USE THE MATERIALS, EVEN IF AMD HAS BEEN ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGES. BECAUSE SOME JURSIDICTIONS PROHIBIT THE EXCLUSION OR
+ * LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE
+ * LIMITATION MAY NOT APPLY TO YOU.
+ *
+ * AMD does not assume any responsibility for any errors that may appear in
+ * the Materials nor any responsibility to support or update the Materials.
+ * AMD retains the right to make changes to its test specifications at any
+ * time, without notice.
+ *
+ * So that all may benefit from your experience, please report any problems
+ * or suggestions about this software back to AMD. Please include your name,
+ * company, telephone number, AMD product requiring support and question or
+ * problem encountered.
+ *
+ * Advanced Micro Devices, Inc. Worldwide support and contact
+ * Embedded Processor Division information available at:
+ * Systems Engineering epd.support@amd.com
+ * 5204 E. Ben White Blvd. -or-
+ * Austin, TX 78741 http://www.amd.com/html/support/techsup.html
+ * ============================================================================
+ */
+
+
+/*******************************************************************************
+ * AUTHOR : Buddy Fey - Original.
+ *******************************************************************************
+ */
+
+
+/*******************************************************************************
+ * FUNCTIONAL DESCRIPTION:
+ * This routine is called to autodetect the geometry of the DRAM.
+ *
+ * This routine is called to determine the number of column bits for the DRAM
+ * devices in this external bank. This routine assumes that the external bank
+ * has been configured for an 11-bit column and for 4 internal banks. This gives
+ * us the maximum address reach in memory. By writing a test value to the max
+ * address and locating where it aliases to, we can determine the number of valid
+ * column bits.
+ *
+ * This routine is called to determine the number of internal banks each DRAM
+ * device has. The external bank (under test) is configured for maximum reach
+ * with 11-bit columns and 4 internal banks. This routine will write to a max
+ * address (BA1 and BA0 = 1) and then read from an address with BA1=0 to see if
+ * that column is a "don't care". If BA1 does not affect write/read of data,
+ * then this device has only 2 internal banks.
+ *
+ * This routine is called to determine the ending address for this external
+ * bank of SDRAM. We write to a max address with a data value and then disable
+ * row address bits looking for "don't care" locations. Each "don't care" bit
+ * represents a dividing of the maximum density (128M) by 2. By dividing the
+ * maximum of 32 4M chunks in an external bank down by all the "don't care" bits
+ * determined during sizing, we set the proper density.
+ *
+ * WARNINGS.
+ * bp must be preserved because it is used for return linkage.
+ *
+ * EXIT
+ * nothing returned - but the memory subsystem is enabled
+ *******************************************************************************
+ */
+
+#include <config.h>
+
+.section .text
+.equ DRCCTL, 0x0fffef010 /* DRAM control register */
+.equ DRCTMCTL, 0x0fffef012 /* DRAM timing control register */
+.equ DRCCFG, 0x0fffef014 /* DRAM bank configuration register */
+.equ DRCBENDADR, 0x0fffef018 /* DRAM bank ending address register */
+.equ ECCCTL, 0x0fffef020 /* DRAM ECC control register */
+.equ ECCINT, 0x0fffefd18 /* DRAM ECC nmi-INT mapping */
+.equ DBCTL, 0x0fffef040 /* DRAM buffer control register */
+
+.equ CACHELINESZ, 0x00000010 /* size of our cache line (read buffer) */
+.equ COL11_ADR, 0x0e001e00 /* 11 col addrs */
+.equ COL10_ADR, 0x0e000e00 /* 10 col addrs */
+.equ COL09_ADR, 0x0e000600 /* 9 col addrs */
+.equ COL08_ADR, 0x0e000200 /* 8 col addrs */
+.equ ROW14_ADR, 0x0f000000 /* 14 row addrs */
+.equ ROW13_ADR, 0x07000000 /* 13 row addrs */
+.equ ROW12_ADR, 0x03000000 /* 12 row addrs */
+.equ ROW11_ADR, 0x01000000 /* 11 row addrs/also bank switch */
+.equ ROW10_ADR, 0x00000000 /* 10 row addrs/also bank switch */
+.equ COL11_DATA, 0x0b0b0b0b /* 11 col addrs */
+.equ COL10_DATA, 0x0a0a0a0a /* 10 col data */
+.equ COL09_DATA, 0x09090909 /* 9 col data */
+.equ COL08_DATA, 0x08080808 /* 8 col data */
+.equ ROW14_DATA, 0x3f3f3f3f /* 14 row data (MASK) */
+.equ ROW13_DATA, 0x1f1f1f1f /* 13 row data (MASK) */
+.equ ROW12_DATA, 0x0f0f0f0f /* 12 row data (MASK) */
+.equ ROW11_DATA, 0x07070707 /* 11 row data/also bank switch (MASK) */
+.equ ROW10_DATA, 0xaaaaaaaa /* 10 row data/also bank switch (MASK) */
+
+
+ /*
+ * initialize dram controller registers
+ */
+.globl mem_init
+mem_init:
+ xorw %ax,%ax
+ movl $DBCTL, %edi
+ movb %al, (%edi) /* disable write buffer */
+
+ movl $ECCCTL, %edi
+ movb %al, (%edi) /* disable ECC */
+
+ movl $DRCTMCTL, %edi
+ movb $0x1E,%al /* Set SDRAM timing for slowest */
+ movb %al, (%edi)
+
+ /*
+ * setup loop to do 4 external banks starting with bank 3
+ */
+ movl $0xff000000,%eax /* enable last bank and setup */
+ movl $DRCBENDADR, %edi /* ending address register */
+ movl %eax, (%edi)
+
+ movl $DRCCFG, %edi /* setup */
+ movw $0xbbbb,%ax /* dram config register for */
+ movw %ax, (%edi)
+
+ /*
+ * issue a NOP to all DRAMs
+ */
+ movl $DRCCTL, %edi /* setup DRAM control register with */
+ movb $0x1,%al /* Disable refresh,disable write buffer */
+ movb %al, (%edi)
+ movl $CACHELINESZ, %esi /* just a dummy address to write for */
+ movw %ax, (%esi)
+ /*
+ * delay for 100 usec? 200?
+ * ******this is a cludge for now *************
+ */
+ movw $100,%cx
+sizdelay:
+ loop sizdelay /* we need 100 usec here */
+ /***********************************************/
+
+ /*
+ * issue all banks precharge
+ */
+ movb $0x2,%al /* All banks precharge */
+ movb %al, (%edi)
+ movw %ax, (%esi)
+
+ /*
+ * issue 2 auto refreshes to all banks
+ */
+ movb $0x4,%al /* Auto refresh cmd */
+ movb %al, (%edi)
+ movw $2,%cx
+refresh1:
+ movw %ax, (%esi)
+ loop refresh1
+
+ /*
+ * issue LOAD MODE REGISTER command
+ */
+ movb $0x3,%al /* Load mode register cmd */
+ movb %al, (%edi)
+ movw %ax, (%esi)
+
+ /*
+ * issue 8 more auto refreshes to all banks
+ */
+ movb $0x4,%al /* Auto refresh cmd */
+ movb %al, (%edi)
+ movw $8,%cx
+refresh2:
+ movw %ax, (%esi)
+ loop refresh2
+
+ /*
+ * set control register to NORMAL mode
+ */
+ movb $0x0,%al /* Normal mode value */
+ movb %al, (%edi)
+
+ /*
+ * size dram starting with external bank 3 moving to external bank 0
+ */
+ movl $0x3,%ecx /* start with external bank 3 */
+
+nextbank:
+
+ /*
+ * write col 11 wrap adr
+ */
+ movl $COL11_ADR, %esi /* set address to max col (11) wrap addr */
+ movl $COL11_DATA, %eax /* pattern for max supported columns(11) */
+ movl %eax, (%esi) /* write max col pattern at max col adr */
+ movl (%esi), %ebx /* optional read */
+ cmpl %ebx,%eax /* to verify write */
+ jnz bad_ram /* this ram is bad */
+ /*
+ * write col 10 wrap adr
+ */
+
+ movl $COL10_ADR, %esi /* set address to 10 col wrap address */
+ movl $COL10_DATA, %eax /* pattern for 10 col wrap */
+ movl %eax, (%esi) /* write 10 col pattern @ 10 col wrap adr */
+ movl (%esi), %ebx /* optional read */
+ cmpl %ebx,%eax /* to verify write */
+ jnz bad_ram /* this ram is bad */
+ /*
+ * write col 9 wrap adr
+ */
+ movl $COL09_ADR, %esi /* set address to 9 col wrap address */
+ movl $COL09_DATA, %eax /* pattern for 9 col wrap */
+ movl %eax, (%esi) /* write 9 col pattern @ 9 col wrap adr */
+ movl (%esi), %ebx /* optional read */
+ cmpl %ebx,%eax /* to verify write */
+ jnz bad_ram /* this ram is bad */
+ /*
+ * write col 8 wrap adr
+ */
+ movl $COL08_ADR, %esi /* set address to min(8) col wrap address */
+ movl $COL08_DATA, %eax /* pattern for min (8) col wrap */
+ movl %eax, (%esi) /* write min col pattern @ min col adr */
+ movl (%esi), %ebx /* optional read */
+ cmpl %ebx,%eax /* to verify write */
+ jnz bad_ram /* this ram is bad */
+ /*
+ * write row 14 wrap adr
+ */
+ movl $ROW14_ADR, %esi /* set address to max row (14) wrap addr */
+ movl $ROW14_DATA, %eax /* pattern for max supported rows(14) */
+ movl %eax, (%esi) /* write max row pattern at max row adr */
+ movl (%esi), %ebx /* optional read */
+ cmpl %ebx,%eax /* to verify write */
+ jnz bad_ram /* this ram is bad */
+ /*
+ * write row 13 wrap adr
+ */
+ movl $ROW13_ADR, %esi /* set address to 13 row wrap address */
+ movl $ROW13_DATA, %eax /* pattern for 13 row wrap */
+ movl %eax, (%esi) /* write 13 row pattern @ 13 row wrap adr */
+ movl (%esi), %ebx /* optional read */
+ cmpl %ebx,%eax /* to verify write */
+ jnz bad_ram /* this ram is bad */
+ /*
+ * write row 12 wrap adr
+ */
+ movl $ROW12_ADR, %esi /* set address to 12 row wrap address */
+ movl $ROW12_DATA, %eax /* pattern for 12 row wrap */
+ movl %eax, (%esi) /* write 12 row pattern @ 12 row wrap adr */
+ movl (%esi), %ebx /* optional read */
+ cmpl %ebx,%eax /* to verify write */
+ jnz bad_ram /* this ram is bad */
+ /*
+ * write row 11 wrap adr
+ */
+ movl $ROW11_ADR, %edi /* set address to 11 row wrap address */
+ movl $ROW11_DATA, %eax /* pattern for 11 row wrap */
+ movl %eax, (%edi) /* write 11 row pattern @ 11 row wrap adr */
+ movl (%edi), %ebx /* optional read */
+ cmpl %ebx,%eax /* to verify write */
+ jnz bad_ram /* this ram is bad */
+ /*
+ * write row 10 wrap adr --- this write is really to determine number of banks
+ */
+ movl $ROW10_ADR, %edi /* set address to 10 row wrap address */
+ movl $ROW10_DATA, %eax /* pattern for 10 row wrap (AA) */
+ movl %eax, (%edi) /* write 10 row pattern @ 10 row wrap adr */
+ movl (%edi), %ebx /* optional read */
+ cmpl %ebx,%eax /* to verify write */
+ jnz bad_ram /* this ram is bad */
+ /*
+ * read data @ row 12 wrap adr to determine * banks,
+ * and read data @ row 14 wrap adr to determine * rows.
+ * if data @ row 12 wrap adr is not AA, 11 or 12 we have bad RAM.
+ * if data @ row 12 wrap == AA, we only have 2 banks, NOT 4
+ * if data @ row 12 wrap == 11 or 12, we have 4 banks,
+ */
+ xorw %di,%di /* value for 2 banks in DI */
+ movl (%esi), %ebx /* read from 12 row wrap to check banks
+ * (esi is setup from the write to row 12 wrap) */
+ cmpl %ebx,%eax /* check for AA pattern (eax holds the aa pattern) */
+ jz only2 /* if pattern == AA, we only have 2 banks */
+
+ /* 4 banks */
+
+ movw $8,%di /* value for 4 banks in DI (BNK_CNT bit) */
+ cmpl $ROW11_DATA, %ebx /* only other legitimate values are 11 */
+ jz only2
+ cmpl $ROW12_DATA, %ebx /* and 12 */
+ jnz bad_ram /* its bad if not 11 or 12! */
+
+ /* fall through */
+only2:
+ /*
+ * validate row mask
+ */
+ movl $ROW14_ADR, %esi /* set address back to max row wrap addr */
+ movl (%esi), %eax /* read actual number of rows @ row14 adr */
+
+ cmpl $ROW11_DATA, %eax /* row must be greater than 11 pattern */
+ jb bad_ram
+
+ cmpl $ROW14_DATA, %eax /* and row must be less than 14 pattern */
+ ja bad_ram
+
+ cmpb %ah,%al /* verify all 4 bytes of dword same */
+ jnz bad_ram
+ movl %eax,%ebx
+ shrl $16,%ebx
+ cmpw %bx,%ax
+ jnz bad_ram
+ /*
+ * read col 11 wrap adr for real column data value
+ */
+ movl $COL11_ADR, %esi /* set address to max col (11) wrap addr */
+ movl (%esi), %eax /* read real col number at max col adr */
+ /*
+ * validate column data
+ */
+ cmpl $COL08_DATA, %eax /* col must be greater than 8 pattern */
+ jb bad_ram
+
+ cmpl $COL11_DATA, %eax /* and row must be less than 11 pattern */
+ ja bad_ram
+
+ subl $COL08_DATA, %eax /* normalize column data to zero */
+ jc bad_ram
+ cmpb %ah,%al /* verify all 4 bytes of dword equal */
+ jnz bad_ram
+ movl %eax,%edx
+ shrl $16,%edx
+ cmpw %dx,%ax
+ jnz bad_ram
+ /*
+ * merge bank and col data together
+ */
+ addw %di,%dx /* merge of bank and col info in dl */
+ /*
+ * fix ending addr mask based upon col info
+ */
+ movb $3,%al
+ subb %dh,%al /* dh contains the overflow from the bank/col merge */
+ movb %bl,%dh /* bl contains the row mask (aa, 07, 0f, 1f or 3f) */
+ xchgw %cx,%ax /* cx = ax = 3 or 2 depending on 2 or 4 bank device */
+ shrb %cl,%dh /* */
+ incb %dh /* ending addr is 1 greater than real end */
+ xchgw %cx,%ax /* cx is bank number again */
+ /*
+ * issue all banks precharge
+ */
+bad_reint:
+ movl $DRCCTL, %esi /* setup DRAM control register with */
+ movb $0x2,%al /* All banks precharge */
+ movb %al, (%esi)
+ movl $CACHELINESZ, %esi /* address to init read buffer */
+ movw %ax, (%esi)
+
+ /*
+ * update ENDING ADDRESS REGISTER
+ */
+ movl $DRCBENDADR, %edi /* DRAM ending address register */
+ movl %ecx,%ebx
+ addl %ebx, %edi
+ movb %dh, (%edi)
+ /*
+ * update CONFIG REGISTER
+ */
+ xorb %dh,%dh
+ movw $0x00f,%bx
+ movw %cx,%ax
+ shlw $2,%ax
+ xchgw %cx,%ax
+ shlw %cl,%dx
+ shlw %cl,%bx
+ notw %bx
+ xchgw %cx,%ax
+ movl $DRCCFG, %edi
+ mov (%edi), %ax
+ andw %bx,%ax
+ orw %dx,%ax
+ movw %ax, (%edi)
+ jcxz cleanup
+
+ decw %cx
+ movl %ecx,%ebx
+ movl $DRCBENDADR, %edi /* DRAM ending address register */
+ movb $0xff,%al
+ addl %ebx, %edi
+ movb %al, (%edi)
+ /*
+ * set control register to NORMAL mode
+ */
+ movl $DRCCTL, %esi /* setup DRAM control register with */
+ movb $0x0,%al /* Normal mode value */
+ movb %al, (%esi)
+ movl $CACHELINESZ, %esi /* address to init read buffer */
+ movw %ax, (%esi)
+ jmp nextbank
+
+cleanup:
+ movl $DRCBENDADR, %edi /* DRAM ending address register */
+ movw $4,%cx
+ xorw %ax,%ax
+cleanuplp:
+ movb (%edi), %al
+ orb %al,%al
+ jz emptybank
+
+ addb %ah,%al
+ jns nottoomuch
+
+ movb $0x7f,%al
+nottoomuch:
+ movb %al,%ah
+ orb $0x80,%al
+ movb %al, (%edi)
+emptybank:
+ incl %edi
+ loop cleanuplp
+
+#if defined CONFIG_SYS_SDRAM_DRCTMCTL
+ /* just have your hardware desinger _GIVE_ you what you need here! */
+ movl $DRCTMCTL, %edi
+ movb $CONFIG_SYS_SDRAM_DRCTMCTL,%al
+ movb (%edi), %al
+#else
+#if defined(CONFIG_SYS_SDRAM_CAS_LATENCY_2T) || defined(CONFIG_SYS_SDRAM_CAS_LATENCY_3T)
+ /* set the CAS latency now since it is hard to do
+ * when we run from the RAM */
+ movl $DRCTMCTL, %edi /* DRAM timing register */
+ movb (%edi), %al
+#ifdef CONFIG_SYS_SDRAM_CAS_LATENCY_2T
+ andb $0xef, %al
+#endif
+#ifdef CONFIG_SYS_SDRAM_CAS_LATENCY_3T
+ orb $0x10, %al
+#endif
+ movb %al, (%edi)
+#endif
+#endif
+ movl $DRCCTL, %edi /* DRAM Control register */
+ movb $0x3,%al /* Load mode register cmd */
+ movb %al, (%edi)
+ movw %ax, (%esi)
+
+
+ movl $DRCCTL, %edi /* DRAM Control register */
+ movb $0x18,%al /* Enable refresh and NORMAL mode */
+ movb %al, (%edi)
+
+ jmp dram_done
+
+bad_ram:
+ xorl %edx,%edx
+ xorl %edi,%edi
+ jmp bad_reint
+
+dram_done:
+
+ /* readback DRCBENDADR and return the number
+ * of available ram bytes in %eax */
+
+ movl $DRCBENDADR, %edi /* DRAM ending address register */
+
+ movl (%edi), %eax
+ movl %eax, %ecx
+ andl $0x80000000, %ecx
+ jz bank2
+ andl $0x7f000000, %eax
+ shrl $2, %eax
+ movl %eax, %ebx
+
+bank2: movl (%edi), %eax
+ movl %eax, %ecx
+ andl $0x00800000, %ecx
+ jz bank1
+ andl $0x007f0000, %eax
+ shll $6, %eax
+ movl %eax, %ebx
+
+bank1: movl (%edi), %eax
+ movl %eax, %ecx
+ andl $0x00008000, %ecx
+ jz bank0
+ andl $0x00007f00, %eax
+ shll $14, %eax
+ movl %eax, %ebx
+
+bank0: movl (%edi), %eax
+ movl %eax, %ecx
+ andl $0x00000080, %ecx
+ jz done
+ andl $0x0000007f, %eax
+ shll $22, %eax
+ movl %eax, %ebx
+
+
+done:
+ movl %ebx, %eax
+
+#if CONFIG_SYS_SDRAM_ECC_ENABLE
+ /* A nominal memory test: just a byte at each address line */
+ movl %eax, %ecx
+ shrl $0x1, %ecx
+ movl $0x1, %edi
+memtest0:
+ movb $0xa5, (%edi)
+ cmpb $0xa5, (%edi)
+ jne out
+ shrl $1, %ecx
+ andl %ecx,%ecx
+ jz set_ecc
+ shll $1, %edi
+ jmp memtest0
+
+set_ecc:
+ /* clear all ram with a memset */
+ movl %eax, %ecx
+ xorl %esi, %esi
+ xorl %edi, %edi
+ xorl %eax, %eax
+ shrl $2, %ecx
+ cld
+ rep stosl
+ /* enable read, write buffers */
+ movb $0x11, %al
+ movl $DBCTL, %edi
+ movb %al, (%edi)
+ /* enable NMI mapping for ECC */
+ movl $ECCINT, %edi
+ mov $0x10, %al
+ movb %al, (%edi)
+ /* Turn on ECC */
+ movl $ECCCTL, %edi
+ mov $0x05, %al
+ movb %al, (%edi)
+#endif
+out:
+ movl %ebx, %eax
+ jmp *%ebp
+++ /dev/null
-/*
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-/* This file is largely based on code obtned from AMD. AMD's original
- * copyright is included below
- */
-
-/*
- * =============================================================================
- *
- * Copyright 1999 Advanced Micro Devices, Inc.
- *
- * This software is the property of Advanced Micro Devices, Inc (AMD) which
- * specifically grants the user the right to modify, use and distribute this
- * software provided this COPYRIGHT NOTICE is not removed or altered. All
- * other rights are reserved by AMD.
- *
- * THE MATERIALS ARE PROVIDED "AS IS" WITHOUT ANY EXPRESS OR IMPLIED WARRANTY
- * OF ANY KIND INCLUDING WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT OF
- * THIRD-PARTY INTELLECTUAL PROPERTY, OR FITNESS FOR ANY PARTICULAR PURPOSE.
- * IN NO EVENT SHALL AMD OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER
- * (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS
- * INTERRUPTION, LOSS OF INFORMAITON) ARISING OUT OF THE USE OF OR INABILITY
- * TO USE THE MATERIALS, EVEN IF AMD HAS BEEN ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGES. BECAUSE SOME JURSIDICTIONS PROHIBIT THE EXCLUSION OR
- * LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE
- * LIMITATION MAY NOT APPLY TO YOU.
- *
- * AMD does not assume any responsibility for any errors that may appear in
- * the Materials nor any responsibility to support or update the Materials.
- * AMD retains the right to make changes to its test specifications at any
- * time, without notice.
- *
- * So that all may benefit from your experience, please report any problems
- * or suggestions about this software back to AMD. Please include your name,
- * company, telephone number, AMD product requiring support and question or
- * problem encountered.
- *
- * Advanced Micro Devices, Inc. Worldwide support and contact
- * Embedded Processor Division information available at:
- * Systems Engineering epd.support@amd.com
- * 5204 E. Ben White Blvd. -or-
- * Austin, TX 78741 http://www.amd.com/html/support/techsup.html
- * ============================================================================
- */
-
-
-/*******************************************************************************
- * AUTHOR : Buddy Fey - Original.
- *******************************************************************************
- */
-
-
-/*******************************************************************************
- * FUNCTIONAL DESCRIPTION:
- * This routine is called to autodetect the geometry of the DRAM.
- *
- * This routine is called to determine the number of column bits for the DRAM
- * devices in this external bank. This routine assumes that the external bank
- * has been configured for an 11-bit column and for 4 internal banks. This gives
- * us the maximum address reach in memory. By writing a test value to the max
- * address and locating where it aliases to, we can determine the number of valid
- * column bits.
- *
- * This routine is called to determine the number of internal banks each DRAM
- * device has. The external bank (under test) is configured for maximum reach
- * with 11-bit columns and 4 internal banks. This routine will write to a max
- * address (BA1 and BA0 = 1) and then read from an address with BA1=0 to see if
- * that column is a "don't care". If BA1 does not affect write/read of data,
- * then this device has only 2 internal banks.
- *
- * This routine is called to determine the ending address for this external
- * bank of SDRAM. We write to a max address with a data value and then disable
- * row address bits looking for "don't care" locations. Each "don't care" bit
- * represents a dividing of the maximum density (128M) by 2. By dividing the
- * maximum of 32 4M chunks in an external bank down by all the "don't care" bits
- * determined during sizing, we set the proper density.
- *
- * WARNINGS.
- * bp must be preserved because it is used for return linkage.
- *
- * EXIT
- * nothing returned - but the memory subsystem is enabled
- *******************************************************************************
- */
-
-#include <config.h>
-#ifdef CONFIG_SC520
-
-.section .text
-.equ DRCCTL, 0x0fffef010 /* DRAM control register */
-.equ DRCTMCTL, 0x0fffef012 /* DRAM timing control register */
-.equ DRCCFG, 0x0fffef014 /* DRAM bank configuration register */
-.equ DRCBENDADR, 0x0fffef018 /* DRAM bank ending address register */
-.equ ECCCTL, 0x0fffef020 /* DRAM ECC control register */
-.equ ECCINT, 0x0fffefd18 /* DRAM ECC nmi-INT mapping */
-.equ DBCTL, 0x0fffef040 /* DRAM buffer control register */
-
-.equ CACHELINESZ, 0x00000010 /* size of our cache line (read buffer) */
-.equ COL11_ADR, 0x0e001e00 /* 11 col addrs */
-.equ COL10_ADR, 0x0e000e00 /* 10 col addrs */
-.equ COL09_ADR, 0x0e000600 /* 9 col addrs */
-.equ COL08_ADR, 0x0e000200 /* 8 col addrs */
-.equ ROW14_ADR, 0x0f000000 /* 14 row addrs */
-.equ ROW13_ADR, 0x07000000 /* 13 row addrs */
-.equ ROW12_ADR, 0x03000000 /* 12 row addrs */
-.equ ROW11_ADR, 0x01000000 /* 11 row addrs/also bank switch */
-.equ ROW10_ADR, 0x00000000 /* 10 row addrs/also bank switch */
-.equ COL11_DATA, 0x0b0b0b0b /* 11 col addrs */
-.equ COL10_DATA, 0x0a0a0a0a /* 10 col data */
-.equ COL09_DATA, 0x09090909 /* 9 col data */
-.equ COL08_DATA, 0x08080808 /* 8 col data */
-.equ ROW14_DATA, 0x3f3f3f3f /* 14 row data (MASK) */
-.equ ROW13_DATA, 0x1f1f1f1f /* 13 row data (MASK) */
-.equ ROW12_DATA, 0x0f0f0f0f /* 12 row data (MASK) */
-.equ ROW11_DATA, 0x07070707 /* 11 row data/also bank switch (MASK) */
-.equ ROW10_DATA, 0xaaaaaaaa /* 10 row data/also bank switch (MASK) */
-
-
- /*
- * initialize dram controller registers
- */
-.globl mem_init
-mem_init:
- xorw %ax,%ax
- movl $DBCTL, %edi
- movb %al, (%edi) /* disable write buffer */
-
- movl $ECCCTL, %edi
- movb %al, (%edi) /* disable ECC */
-
- movl $DRCTMCTL, %edi
- movb $0x1E,%al /* Set SDRAM timing for slowest */
- movb %al, (%edi)
-
- /*
- * setup loop to do 4 external banks starting with bank 3
- */
- movl $0xff000000,%eax /* enable last bank and setup */
- movl $DRCBENDADR, %edi /* ending address register */
- movl %eax, (%edi)
-
- movl $DRCCFG, %edi /* setup */
- movw $0xbbbb,%ax /* dram config register for */
- movw %ax, (%edi)
-
- /*
- * issue a NOP to all DRAMs
- */
- movl $DRCCTL, %edi /* setup DRAM control register with */
- movb $0x1,%al /* Disable refresh,disable write buffer */
- movb %al, (%edi)
- movl $CACHELINESZ, %esi /* just a dummy address to write for */
- movw %ax, (%esi)
- /*
- * delay for 100 usec? 200?
- * ******this is a cludge for now *************
- */
- movw $100,%cx
-sizdelay:
- loop sizdelay /* we need 100 usec here */
- /***********************************************/
-
- /*
- * issue all banks precharge
- */
- movb $0x2,%al /* All banks precharge */
- movb %al, (%edi)
- movw %ax, (%esi)
-
- /*
- * issue 2 auto refreshes to all banks
- */
- movb $0x4,%al /* Auto refresh cmd */
- movb %al, (%edi)
- movw $2,%cx
-refresh1:
- movw %ax, (%esi)
- loop refresh1
-
- /*
- * issue LOAD MODE REGISTER command
- */
- movb $0x3,%al /* Load mode register cmd */
- movb %al, (%edi)
- movw %ax, (%esi)
-
- /*
- * issue 8 more auto refreshes to all banks
- */
- movb $0x4,%al /* Auto refresh cmd */
- movb %al, (%edi)
- movw $8,%cx
-refresh2:
- movw %ax, (%esi)
- loop refresh2
-
- /*
- * set control register to NORMAL mode
- */
- movb $0x0,%al /* Normal mode value */
- movb %al, (%edi)
-
- /*
- * size dram starting with external bank 3 moving to external bank 0
- */
- movl $0x3,%ecx /* start with external bank 3 */
-
-nextbank:
-
- /*
- * write col 11 wrap adr
- */
- movl $COL11_ADR, %esi /* set address to max col (11) wrap addr */
- movl $COL11_DATA, %eax /* pattern for max supported columns(11) */
- movl %eax, (%esi) /* write max col pattern at max col adr */
- movl (%esi), %ebx /* optional read */
- cmpl %ebx,%eax /* to verify write */
- jnz bad_ram /* this ram is bad */
- /*
- * write col 10 wrap adr
- */
-
- movl $COL10_ADR, %esi /* set address to 10 col wrap address */
- movl $COL10_DATA, %eax /* pattern for 10 col wrap */
- movl %eax, (%esi) /* write 10 col pattern @ 10 col wrap adr */
- movl (%esi), %ebx /* optional read */
- cmpl %ebx,%eax /* to verify write */
- jnz bad_ram /* this ram is bad */
- /*
- * write col 9 wrap adr
- */
- movl $COL09_ADR, %esi /* set address to 9 col wrap address */
- movl $COL09_DATA, %eax /* pattern for 9 col wrap */
- movl %eax, (%esi) /* write 9 col pattern @ 9 col wrap adr */
- movl (%esi), %ebx /* optional read */
- cmpl %ebx,%eax /* to verify write */
- jnz bad_ram /* this ram is bad */
- /*
- * write col 8 wrap adr
- */
- movl $COL08_ADR, %esi /* set address to min(8) col wrap address */
- movl $COL08_DATA, %eax /* pattern for min (8) col wrap */
- movl %eax, (%esi) /* write min col pattern @ min col adr */
- movl (%esi), %ebx /* optional read */
- cmpl %ebx,%eax /* to verify write */
- jnz bad_ram /* this ram is bad */
- /*
- * write row 14 wrap adr
- */
- movl $ROW14_ADR, %esi /* set address to max row (14) wrap addr */
- movl $ROW14_DATA, %eax /* pattern for max supported rows(14) */
- movl %eax, (%esi) /* write max row pattern at max row adr */
- movl (%esi), %ebx /* optional read */
- cmpl %ebx,%eax /* to verify write */
- jnz bad_ram /* this ram is bad */
- /*
- * write row 13 wrap adr
- */
- movl $ROW13_ADR, %esi /* set address to 13 row wrap address */
- movl $ROW13_DATA, %eax /* pattern for 13 row wrap */
- movl %eax, (%esi) /* write 13 row pattern @ 13 row wrap adr */
- movl (%esi), %ebx /* optional read */
- cmpl %ebx,%eax /* to verify write */
- jnz bad_ram /* this ram is bad */
- /*
- * write row 12 wrap adr
- */
- movl $ROW12_ADR, %esi /* set address to 12 row wrap address */
- movl $ROW12_DATA, %eax /* pattern for 12 row wrap */
- movl %eax, (%esi) /* write 12 row pattern @ 12 row wrap adr */
- movl (%esi), %ebx /* optional read */
- cmpl %ebx,%eax /* to verify write */
- jnz bad_ram /* this ram is bad */
- /*
- * write row 11 wrap adr
- */
- movl $ROW11_ADR, %edi /* set address to 11 row wrap address */
- movl $ROW11_DATA, %eax /* pattern for 11 row wrap */
- movl %eax, (%edi) /* write 11 row pattern @ 11 row wrap adr */
- movl (%edi), %ebx /* optional read */
- cmpl %ebx,%eax /* to verify write */
- jnz bad_ram /* this ram is bad */
- /*
- * write row 10 wrap adr --- this write is really to determine number of banks
- */
- movl $ROW10_ADR, %edi /* set address to 10 row wrap address */
- movl $ROW10_DATA, %eax /* pattern for 10 row wrap (AA) */
- movl %eax, (%edi) /* write 10 row pattern @ 10 row wrap adr */
- movl (%edi), %ebx /* optional read */
- cmpl %ebx,%eax /* to verify write */
- jnz bad_ram /* this ram is bad */
- /*
- * read data @ row 12 wrap adr to determine * banks,
- * and read data @ row 14 wrap adr to determine * rows.
- * if data @ row 12 wrap adr is not AA, 11 or 12 we have bad RAM.
- * if data @ row 12 wrap == AA, we only have 2 banks, NOT 4
- * if data @ row 12 wrap == 11 or 12, we have 4 banks,
- */
- xorw %di,%di /* value for 2 banks in DI */
- movl (%esi), %ebx /* read from 12 row wrap to check banks
- * (esi is setup from the write to row 12 wrap) */
- cmpl %ebx,%eax /* check for AA pattern (eax holds the aa pattern) */
- jz only2 /* if pattern == AA, we only have 2 banks */
-
- /* 4 banks */
-
- movw $8,%di /* value for 4 banks in DI (BNK_CNT bit) */
- cmpl $ROW11_DATA, %ebx /* only other legitimate values are 11 */
- jz only2
- cmpl $ROW12_DATA, %ebx /* and 12 */
- jnz bad_ram /* its bad if not 11 or 12! */
-
- /* fall through */
-only2:
- /*
- * validate row mask
- */
- movl $ROW14_ADR, %esi /* set address back to max row wrap addr */
- movl (%esi), %eax /* read actual number of rows @ row14 adr */
-
- cmpl $ROW11_DATA, %eax /* row must be greater than 11 pattern */
- jb bad_ram
-
- cmpl $ROW14_DATA, %eax /* and row must be less than 14 pattern */
- ja bad_ram
-
- cmpb %ah,%al /* verify all 4 bytes of dword same */
- jnz bad_ram
- movl %eax,%ebx
- shrl $16,%ebx
- cmpw %bx,%ax
- jnz bad_ram
- /*
- * read col 11 wrap adr for real column data value
- */
- movl $COL11_ADR, %esi /* set address to max col (11) wrap addr */
- movl (%esi), %eax /* read real col number at max col adr */
- /*
- * validate column data
- */
- cmpl $COL08_DATA, %eax /* col must be greater than 8 pattern */
- jb bad_ram
-
- cmpl $COL11_DATA, %eax /* and row must be less than 11 pattern */
- ja bad_ram
-
- subl $COL08_DATA, %eax /* normalize column data to zero */
- jc bad_ram
- cmpb %ah,%al /* verify all 4 bytes of dword equal */
- jnz bad_ram
- movl %eax,%edx
- shrl $16,%edx
- cmpw %dx,%ax
- jnz bad_ram
- /*
- * merge bank and col data together
- */
- addw %di,%dx /* merge of bank and col info in dl */
- /*
- * fix ending addr mask based upon col info
- */
- movb $3,%al
- subb %dh,%al /* dh contains the overflow from the bank/col merge */
- movb %bl,%dh /* bl contains the row mask (aa, 07, 0f, 1f or 3f) */
- xchgw %cx,%ax /* cx = ax = 3 or 2 depending on 2 or 4 bank device */
- shrb %cl,%dh /* */
- incb %dh /* ending addr is 1 greater than real end */
- xchgw %cx,%ax /* cx is bank number again */
- /*
- * issue all banks precharge
- */
-bad_reint:
- movl $DRCCTL, %esi /* setup DRAM control register with */
- movb $0x2,%al /* All banks precharge */
- movb %al, (%esi)
- movl $CACHELINESZ, %esi /* address to init read buffer */
- movw %ax, (%esi)
-
- /*
- * update ENDING ADDRESS REGISTER
- */
- movl $DRCBENDADR, %edi /* DRAM ending address register */
- movl %ecx,%ebx
- addl %ebx, %edi
- movb %dh, (%edi)
- /*
- * update CONFIG REGISTER
- */
- xorb %dh,%dh
- movw $0x00f,%bx
- movw %cx,%ax
- shlw $2,%ax
- xchgw %cx,%ax
- shlw %cl,%dx
- shlw %cl,%bx
- notw %bx
- xchgw %cx,%ax
- movl $DRCCFG, %edi
- mov (%edi), %ax
- andw %bx,%ax
- orw %dx,%ax
- movw %ax, (%edi)
- jcxz cleanup
-
- decw %cx
- movl %ecx,%ebx
- movl $DRCBENDADR, %edi /* DRAM ending address register */
- movb $0xff,%al
- addl %ebx, %edi
- movb %al, (%edi)
- /*
- * set control register to NORMAL mode
- */
- movl $DRCCTL, %esi /* setup DRAM control register with */
- movb $0x0,%al /* Normal mode value */
- movb %al, (%esi)
- movl $CACHELINESZ, %esi /* address to init read buffer */
- movw %ax, (%esi)
- jmp nextbank
-
-cleanup:
- movl $DRCBENDADR, %edi /* DRAM ending address register */
- movw $4,%cx
- xorw %ax,%ax
-cleanuplp:
- movb (%edi), %al
- orb %al,%al
- jz emptybank
-
- addb %ah,%al
- jns nottoomuch
-
- movb $0x7f,%al
-nottoomuch:
- movb %al,%ah
- orb $0x80,%al
- movb %al, (%edi)
-emptybank:
- incl %edi
- loop cleanuplp
-
-#if defined CONFIG_SYS_SDRAM_DRCTMCTL
- /* just have your hardware desinger _GIVE_ you what you need here! */
- movl $DRCTMCTL, %edi
- movb $CONFIG_SYS_SDRAM_DRCTMCTL,%al
- movb (%edi), %al
-#else
-#if defined(CONFIG_SYS_SDRAM_CAS_LATENCY_2T) || defined(CONFIG_SYS_SDRAM_CAS_LATENCY_3T)
- /* set the CAS latency now since it is hard to do
- * when we run from the RAM */
- movl $DRCTMCTL, %edi /* DRAM timing register */
- movb (%edi), %al
-#ifdef CONFIG_SYS_SDRAM_CAS_LATENCY_2T
- andb $0xef, %al
-#endif
-#ifdef CONFIG_SYS_SDRAM_CAS_LATENCY_3T
- orb $0x10, %al
-#endif
- movb %al, (%edi)
-#endif
-#endif
- movl $DRCCTL, %edi /* DRAM Control register */
- movb $0x3,%al /* Load mode register cmd */
- movb %al, (%edi)
- movw %ax, (%esi)
-
-
- movl $DRCCTL, %edi /* DRAM Control register */
- movb $0x18,%al /* Enable refresh and NORMAL mode */
- movb %al, (%edi)
-
- jmp dram_done
-
-bad_ram:
- xorl %edx,%edx
- xorl %edi,%edi
- jmp bad_reint
-
-dram_done:
-
- /* readback DRCBENDADR and return the number
- * of available ram bytes in %eax */
-
- movl $DRCBENDADR, %edi /* DRAM ending address register */
-
- movl (%edi), %eax
- movl %eax, %ecx
- andl $0x80000000, %ecx
- jz bank2
- andl $0x7f000000, %eax
- shrl $2, %eax
- movl %eax, %ebx
-
-bank2: movl (%edi), %eax
- movl %eax, %ecx
- andl $0x00800000, %ecx
- jz bank1
- andl $0x007f0000, %eax
- shll $6, %eax
- movl %eax, %ebx
-
-bank1: movl (%edi), %eax
- movl %eax, %ecx
- andl $0x00008000, %ecx
- jz bank0
- andl $0x00007f00, %eax
- shll $14, %eax
- movl %eax, %ebx
-
-bank0: movl (%edi), %eax
- movl %eax, %ecx
- andl $0x00000080, %ecx
- jz done
- andl $0x0000007f, %eax
- shll $22, %eax
- movl %eax, %ebx
-
-
-done:
- movl %ebx, %eax
-
-#if CONFIG_SYS_SDRAM_ECC_ENABLE
- /* A nominal memory test: just a byte at each address line */
- movl %eax, %ecx
- shrl $0x1, %ecx
- movl $0x1, %edi
-memtest0:
- movb $0xa5, (%edi)
- cmpb $0xa5, (%edi)
- jne out
- shrl $1, %ecx
- andl %ecx,%ecx
- jz set_ecc
- shll $1, %edi
- jmp memtest0
-
-set_ecc:
- /* clear all ram with a memset */
- movl %eax, %ecx
- xorl %esi, %esi
- xorl %edi, %edi
- xorl %eax, %eax
- shrl $2, %ecx
- cld
- rep stosl
- /* enable read, write buffers */
- movb $0x11, %al
- movl $DBCTL, %edi
- movb %al, (%edi)
- /* enable NMI mapping for ECC */
- movl $ECCINT, %edi
- mov $0x10, %al
- movb %al, (%edi)
- /* Turn on ECC */
- movl $ECCCTL, %edi
- mov $0x05, %al
- movb %al, (%edi)
-#endif
-out:
- movl %ebx, %eax
- jmp *%ebp
-
-#endif /* CONFIG_SC520 */
projects / u-boot / commitdiff