2 * (C) Copyright 2007-2010 DENX Software Engineering
3 * Copyright (C) 2004-2006 Freescale Semiconductor, Inc.
5 * SPDX-License-Identifier: GPL-2.0+
9 * CPU specific code for the MPC512x family.
11 * Derived from the MPC83xx code.
18 #include <asm/processor.h>
21 #if defined(CONFIG_OF_LIBFDT)
22 #include <fdt_support.h>
25 DECLARE_GLOBAL_DATA_PTR;
29 volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
30 ulong clock = gd->cpu_clk;
32 u32 spridr = in_be32(&immr->sysconf.spridr);
33 char buf1[32], buf2[32];
37 switch (spridr & 0xffff0000) {
42 printf ("Unknown part ID %08x ", spridr & 0xffff0000);
44 printf ("rev. %d.%d, Core ", SVR_MJREV (spridr), SVR_MNREV (spridr));
46 switch (pvr & 0xffff0000) {
53 printf ("at %s MHz, CSB at %s MHz (RSR=0x%04lx)\n",
55 strmhz(buf2, gd->arch.csb_clk),
56 gd->arch.reset_status & 0xffff);
62 do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
65 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
67 /* Interrupts and MMU off */
68 __asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
70 msr &= ~( MSR_EE | MSR_IR | MSR_DR);
71 __asm__ __volatile__ ("mtmsr %0"::"r" (msr));
74 * Enable Reset Control Reg - "RSTE" is the magic word that let us go
76 out_be32(&immap->reset.rpr, 0x52535445);
78 /* Verify Reset Control Reg is enabled */
79 while (!(in_be32(&immap->reset.rcer) & RCER_CRE))
82 printf ("Resetting the board.\n");
86 out_be32(&immap->reset.rcr, RCR_SWHR);
94 * Get timebase clock frequency (like cpu_clk in Hz)
96 unsigned long get_tbclk (void)
100 tbclk = (gd->bus_clk + 3L) / 4L;
106 #if defined(CONFIG_WATCHDOG)
107 void watchdog_reset (void)
109 int re_enable = disable_interrupts ();
112 volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
113 out_be32(&immr->wdt.swsrr, 0x556c);
114 out_be32(&immr->wdt.swsrr, 0xaa39);
117 enable_interrupts ();
121 #ifdef CONFIG_OF_LIBFDT
123 #ifdef CONFIG_OF_SUPPORT_OLD_DEVICE_TREES
125 * fdt setup for old device trees
131 static void old_ft_cpu_setup(void *blob, bd_t *bd)
134 * avoid fixing up by path because that
135 * produces scary error messages
140 * old device trees have ethernet nodes with
141 * device_type = "network"
143 eth_getenv_enetaddr("ethaddr", enetaddr);
144 do_fixup_by_prop(blob, "device_type", "network", 8,
145 "local-mac-address", enetaddr, 6, 0);
146 do_fixup_by_prop(blob, "device_type", "network", 8,
147 "address", enetaddr, 6, 0);
149 * old device trees have soc nodes with
150 * device_type = "soc"
152 do_fixup_by_prop_u32(blob, "device_type", "soc", 4,
153 "bus-frequency", bd->bi_ipsfreq, 0);
157 static void ft_clock_setup(void *blob, bd_t *bd)
159 char *cpu_path = "/cpus/" OF_CPU;
162 * fixup cpu clocks using path
164 do_fixup_by_path_u32(blob, cpu_path,
165 "timebase-frequency", OF_TBCLK, 1);
166 do_fixup_by_path_u32(blob, cpu_path,
167 "bus-frequency", bd->bi_busfreq, 1);
168 do_fixup_by_path_u32(blob, cpu_path,
169 "clock-frequency", bd->bi_intfreq, 1);
171 * fixup soc clocks using compatible
173 do_fixup_by_compat_u32(blob, OF_SOC_COMPAT,
174 "bus-frequency", bd->bi_ipsfreq, 1);
177 void ft_cpu_setup(void *blob, bd_t *bd)
179 #ifdef CONFIG_OF_SUPPORT_OLD_DEVICE_TREES
180 old_ft_cpu_setup(blob, bd);
182 ft_clock_setup(blob, bd);
183 #ifdef CONFIG_HAS_ETH0
184 fdt_fixup_ethernet(blob);
186 fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
190 #ifdef CONFIG_MPC512x_FEC
191 /* Default initializations for FEC controllers. To override,
192 * create a board-specific function called:
193 * int board_eth_init(bd_t *bis)
196 int cpu_eth_init(bd_t *bis)
198 return mpc512x_fec_initialize(bis);