+++ /dev/null
-/*
- * Most of this taken from Redboot hal_platform_setup.h with cleanup
- *
- * 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 <config.h>
-#include <version.h>
-#include <asm/arch/pxa-regs.h>
-
-DRAM_SIZE: .long CONFIG_SYS_DRAM_SIZE
-
-/* wait for coprocessor write complete */
- .macro CPWAIT reg
- mrc p15,0,\reg,c2,c0,0
- mov \reg,\reg
- sub pc,pc,#4
- .endm
-
-.globl lowlevel_init
-lowlevel_init:
-
- mov r10, lr
-
- /* Set up GPIO pins first */
-
- ldr r0, =GPSR0
- ldr r1, =CONFIG_SYS_GPSR0_VAL
- str r1, [r0]
-
- ldr r0, =GPSR1
- ldr r1, =CONFIG_SYS_GPSR1_VAL
- str r1, [r0]
-
- ldr r0, =GPSR2
- ldr r1, =CONFIG_SYS_GPSR2_VAL
- str r1, [r0]
-
- ldr r0, =GPCR0
- ldr r1, =CONFIG_SYS_GPCR0_VAL
- str r1, [r0]
-
- ldr r0, =GPCR1
- ldr r1, =CONFIG_SYS_GPCR1_VAL
- str r1, [r0]
-
- ldr r0, =GPCR2
- ldr r1, =CONFIG_SYS_GPCR2_VAL
- str r1, [r0]
-
- ldr r0, =GRER0
- ldr r1, =CONFIG_SYS_GRER0_VAL
- str r1, [r0]
-
- ldr r0, =GRER1
- ldr r1, =CONFIG_SYS_GRER1_VAL
- str r1, [r0]
-
- ldr r0, =GRER2
- ldr r1, =CONFIG_SYS_GRER2_VAL
- str r1, [r0]
-
- ldr r0, =GFER0
- ldr r1, =CONFIG_SYS_GFER0_VAL
- str r1, [r0]
-
- ldr r0, =GFER1
- ldr r1, =CONFIG_SYS_GFER1_VAL
- str r1, [r0]
-
- ldr r0, =GFER2
- ldr r1, =CONFIG_SYS_GFER2_VAL
- str r1, [r0]
-
- ldr r0, =GPDR0
- ldr r1, =CONFIG_SYS_GPDR0_VAL
- str r1, [r0]
-
- ldr r0, =GPDR1
- ldr r1, =CONFIG_SYS_GPDR1_VAL
- str r1, [r0]
-
- ldr r0, =GPDR2
- ldr r1, =CONFIG_SYS_GPDR2_VAL
- str r1, [r0]
-
- ldr r0, =GAFR0_L
- ldr r1, =CONFIG_SYS_GAFR0_L_VAL
- str r1, [r0]
-
- ldr r0, =GAFR0_U
- ldr r1, =CONFIG_SYS_GAFR0_U_VAL
- str r1, [r0]
-
- ldr r0, =GAFR1_L
- ldr r1, =CONFIG_SYS_GAFR1_L_VAL
- str r1, [r0]
-
- ldr r0, =GAFR1_U
- ldr r1, =CONFIG_SYS_GAFR1_U_VAL
- str r1, [r0]
-
- ldr r0, =GAFR2_L
- ldr r1, =CONFIG_SYS_GAFR2_L_VAL
- str r1, [r0]
-
- ldr r0, =GAFR2_U
- ldr r1, =CONFIG_SYS_GAFR2_U_VAL
- str r1, [r0]
-
- /* enable GPIO pins */
- ldr r0, =PSSR
- ldr r1, =CONFIG_SYS_PSSR_VAL
- str r1, [r0]
-
-
-/*********************************************************************
- Initlialize Memory Controller
-
- See PXA250 Operating System Developer's Guide
-
- pause for 200 uSecs- allow internal clocks to settle
- *Note: only need this if hard reset... doing it anyway for now
-*/
-
- @ Step 1
- @ ---- Wait 200 usec
- ldr r3, =OSCR @ reset the OS Timer Count to zero
- mov r2, #0
- str r2, [r3]
- ldr r4, =0x300 @ really 0x2E1 is about 200usec, so 0x300 should be plenty
-1:
- ldr r2, [r3]
- cmp r4, r2
- bgt 1b
-
-mem_init:
- @ get memory controller base address
- ldr r1, =MEMC_BASE
-
-@****************************************************************************
-@ Step 2
-@
-
- @ Step 2a
- @ write msc0, read back to ensure data latches
- @
- ldr r2, =CONFIG_SYS_MSC0_VAL
- str r2, [r1, #MSC0_OFFSET]
- ldr r2, [r1, #MSC0_OFFSET]
-
- @ write msc1
- ldr r2, =CONFIG_SYS_MSC1_VAL
- str r2, [r1, #MSC1_OFFSET]
- ldr r2, [r1, #MSC1_OFFSET]
-
- @ write msc2
- ldr r2, =CONFIG_SYS_MSC2_VAL
- str r2, [r1, #MSC2_OFFSET]
- ldr r2, [r1, #MSC2_OFFSET]
-
-
-@ Step 2b
- @ write mecr
- ldr r2, =CONFIG_SYS_MECR_VAL
- str r2, [r1, #MECR_OFFSET]
-
- @ write mcmem0
- ldr r2, =CONFIG_SYS_MCMEM0_VAL
- str r2, [r1, #MCMEM0_OFFSET]
-
- @ write mcmem1
- ldr r2, =CONFIG_SYS_MCMEM1_VAL
- str r2, [r1, #MCMEM1_OFFSET]
-
- @ write mcatt0
- ldr r2, =CONFIG_SYS_MCATT0_VAL
- str r2, [r1, #MCATT0_OFFSET]
-
- @ write mcatt1
- ldr r2, =CONFIG_SYS_MCATT1_VAL
- str r2, [r1, #MCATT1_OFFSET]
-
- @ write mcio0
- ldr r2, =CONFIG_SYS_MCIO0_VAL
- str r2, [r1, #MCIO0_OFFSET]
-
- @ write mcio1
- ldr r2, =CONFIG_SYS_MCIO1_VAL
- str r2, [r1, #MCIO1_OFFSET]
-
-@ Step 2c
- @ fly-by-dma is defeatured on this part
- @ write flycnfg
- @ldr r2, =CONFIG_SYS_FLYCNFG_VAL
- @str r2, [r1, #FLYCNFG_OFFSET]
-
-/* FIXME Does this sequence really make sense */
-#ifdef REDBOOT_WAY
- @ Step 2d
- @ get the mdrefr settings
- ldr r3, =CONFIG_SYS_MDREFR_VAL
-
- @ extract DRI field (we need a valid DRI field)
- @
- ldr r2, =0xFFF
-
- @ valid DRI field in r3
- @
- and r3, r3, r2
-
- @ get the reset state of MDREFR
- @
- ldr r4, [r1, #MDREFR_OFFSET]
-
- @ clear the DRI field
- @
- bic r4, r4, r2
-
- @ insert the valid DRI field loaded above
- @
- orr r4, r4, r3
-
- @ write back mdrefr
- @
- str r4, [r1, #MDREFR_OFFSET]
-
- @ *Note: preserve the mdrefr value in r4 *
-
-@****************************************************************************
-@ Step 3
-@
-@ NO SRAM
-
- mov pc, r10
-
-
-@****************************************************************************
-@ Step 4
-@
-
- @ Assumes previous mdrefr value in r4, if not then read current mdrefr
-
- @ clear the free-running clock bits
- @ (clear K0Free, K1Free, K2Free
- @
- bic r4, r4, #(0x00800000 | 0x01000000 | 0x02000000)
-
- @ set K0RUN for CPLD clock
- @
- orr r4, r4, #0x00002000
-
- @ set K1RUN if bank 0 installed
- @
- orr r4, r4, #0x00010000
-
- @ write back mdrefr
- @
- str r4, [r1, #MDREFR_OFFSET]
- ldr r4, [r1, #MDREFR_OFFSET]
-
- @ deassert SLFRSH
- @
- bic r4, r4, #0x00400000
-
- @ write back mdrefr
- @
- str r4, [r1, #MDREFR_OFFSET]
-
- @ assert E1PIN
- @
- orr r4, r4, #0x00008000
-
- @ write back mdrefr
- @
- str r4, [r1, #MDREFR_OFFSET]
- ldr r4, [r1, #MDREFR_OFFSET]
- nop
- nop
-#else
- @ Step 2d
- @ get the mdrefr settings
- ldr r3, =CONFIG_SYS_MDREFR_VAL
-
- @ write back mdrefr
- @
- str r4, [r1, #MDREFR_OFFSET]
-
- @ Step 4
-
- @ set K0RUN for CPLD clock
- @
- orr r4, r4, #0x00002000
-
- @ set K1RUN for bank 0
- @
- orr r4, r4, #0x00010000
-
- @ write back mdrefr
- @
- str r4, [r1, #MDREFR_OFFSET]
- ldr r4, [r1, #MDREFR_OFFSET]
-
- @ deassert SLFRSH
- @
- bic r4, r4, #0x00400000
-
- @ write back mdrefr
- @
- str r4, [r1, #MDREFR_OFFSET]
-
- @ assert E1PIN
- @
- orr r4, r4, #0x00008000
-
- @ write back mdrefr
- @
- str r4, [r1, #MDREFR_OFFSET]
- ldr r4, [r1, #MDREFR_OFFSET]
- nop
- nop
-#endif
-
- @ Step 4d
- @ fetch platform value of mdcnfg
- @
- ldr r2, =CONFIG_SYS_MDCNFG_VAL
-
- @ disable all sdram banks
- @
- bic r2, r2, #(MDCNFG_DE0 | MDCNFG_DE1)
- bic r2, r2, #(MDCNFG_DE2 | MDCNFG_DE3)
-
- @ program banks 0/1 for bus width
- @
- bic r2, r2, #MDCNFG_DWID0 @0=32-bit
-
- @ write initial value of mdcnfg, w/o enabling sdram banks
- @
- str r2, [r1, #MDCNFG_OFFSET]
-
- @ Step 4e
- @ pause for 200 uSecs
- @
- ldr r3, =OSCR @ reset the OS Timer Count to zero
- mov r2, #0
- str r2, [r3]
- ldr r4, =0x300 @ really 0x2E1 is about 200usec, so 0x300 should be plenty
- 1:
- ldr r2, [r3]
- cmp r4, r2
- bgt 1b
-
- /* Why is this here??? */
- mov r0, #0x78 @turn everything off
- mcr p15, 0, r0, c1, c0, 0 @(caches off, MMU off, etc.)
-
- @ Step 4f
- @ Access memory *not yet enabled* for CBR refresh cycles (8)
- @ - CBR is generated for all banks
-
- ldr r2, =CONFIG_SYS_DRAM_BASE
- str r2, [r2]
- str r2, [r2]
- str r2, [r2]
- str r2, [r2]
- str r2, [r2]
- str r2, [r2]
- str r2, [r2]
- str r2, [r2]
-
- @ Step 4g
- @get memory controller base address
- @
- ldr r1, =MEMC_BASE
-
- @fetch current mdcnfg value
- @
- ldr r3, [r1, #MDCNFG_OFFSET]
-
- @enable sdram bank 0 if installed (must do for any populated bank)
- @
- orr r3, r3, #MDCNFG_DE0
-
- @write back mdcnfg, enabling the sdram bank(s)
- @
- str r3, [r1, #MDCNFG_OFFSET]
-
- @ Step 4h
- @ write mdmrs
- @
- ldr r2, =CONFIG_SYS_MDMRS_VAL
- str r2, [r1, #MDMRS_OFFSET]
-
- @ Done Memory Init
-
- /*SET_LED 6 */
-
- @********************************************************************
- @ Disable (mask) all interrupts at the interrupt controller
- @
-
- @ clear the interrupt level register (use IRQ, not FIQ)
- @
- mov r1, #0
- ldr r2, =ICLR
- str r1, [r2]
-
- @ Set interrupt mask register
- @
- ldr r1, =CONFIG_SYS_ICMR_VAL
- ldr r2, =ICMR
- str r1, [r2]
-
- @ ********************************************************************
- @ Disable the peripheral clocks, and set the core clock
- @
-
- @ Turn Off ALL on-chip peripheral clocks for re-configuration
- @
- ldr r1, =CKEN
- mov r2, #0
- str r2, [r1]
-
- @ set core clocks
- @
- ldr r2, =CONFIG_SYS_CCCR_VAL
- ldr r1, =CCCR
- str r2, [r1]
-
- #ifdef ENABLE32KHZ
- @ enable the 32Khz oscillator for RTC and PowerManager
- @
- ldr r1, =OSCC
- mov r2, #OSCC_OON
- str r2, [r1]
-
- @ NOTE: spin here until OSCC.OOK get set,
- @ meaning the PLL has settled.
- @
-60:
- ldr r2, [r1]
- ands r2, r2, #1
- beq 60b
-#endif
-
- @ Turn on needed clocks
- @
- ldr r1, =CKEN
- ldr r2, =CONFIG_SYS_CKEN_VAL
- str r2, [r1]
-
- /*SET_LED 7 */
-
-/* Is this needed???? */
-#define NODEBUG
-#ifdef NODEBUG
- /*Disable software and data breakpoints */
- mov r0,#0
- mcr p15,0,r0,c14,c8,0 /* ibcr0 */
- mcr p15,0,r0,c14,c9,0 /* ibcr1 */
- mcr p15,0,r0,c14,c4,0 /* dbcon */
-
- /*Enable all debug functionality */
- mov r0,#0x80000000
- mcr p14,0,r0,c10,c0,0 /* dcsr */
-
-#endif
-
- mov pc, r10
-
-@ End lowlevel_init
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