2 * (C) Copyright 2000-2010
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
9 * CPU specific code for the MPC5xxx CPUs
19 #include <asm/processor.h>
21 #if defined(CONFIG_OF_LIBFDT)
23 #include <fdt_support.h>
26 #if defined(CONFIG_OF_IDE_FIXUP)
30 DECLARE_GLOBAL_DATA_PTR;
34 ulong clock = gd->cpu_clk;
51 printf("Unknown MPC5xxx");
55 printf (" v%d.%d, Core v%d.%d", SVR_MJREV (svr), SVR_MNREV (svr),
56 PVR_MAJ(pvr), PVR_MIN(pvr));
57 printf (" at %s MHz\n", strmhz (buf, clock));
61 /* ------------------------------------------------------------------------- */
64 do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
67 /* Interrupts and MMU off */
68 __asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
70 msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
71 __asm__ __volatile__ ("mtmsr %0"::"r" (msr));
73 /* Charge the watchdog timer */
74 *(vu_long *)(MPC5XXX_GPT0_COUNTER) = 0x0001000f;
75 *(vu_long *)(MPC5XXX_GPT0_ENABLE) = 0x9004; /* wden|ce|timer_ms */
82 /* ------------------------------------------------------------------------- */
85 * Get timebase clock frequency (like cpu_clk in Hz)
88 unsigned long get_tbclk (void)
92 tbclk = (gd->bus_clk + 3L) / 4L;
97 /* ------------------------------------------------------------------------- */
99 #if defined(CONFIG_OF_LIBFDT) && defined (CONFIG_OF_BOARD_SETUP)
100 void ft_cpu_setup(void *blob, bd_t *bd)
102 int div = in_8((void*)CONFIG_SYS_MBAR + 0x204) & 0x0020 ? 8 : 4;
103 char * cpu_path = "/cpus/" OF_CPU;
104 #ifdef CONFIG_MPC5xxx_FEC
106 char * eth_path = "/" OF_SOC "/ethernet@3000";
109 do_fixup_by_path_u32(blob, cpu_path, "timebase-frequency", OF_TBCLK, 1);
110 do_fixup_by_path_u32(blob, cpu_path, "bus-frequency", bd->bi_busfreq, 1);
111 do_fixup_by_path_u32(blob, cpu_path, "clock-frequency", bd->bi_intfreq, 1);
112 do_fixup_by_path_u32(blob, "/" OF_SOC, "bus-frequency", bd->bi_ipbfreq, 1);
113 do_fixup_by_path_u32(blob, "/" OF_SOC, "system-frequency",
114 bd->bi_busfreq*div, 1);
115 #ifdef CONFIG_MPC5xxx_FEC
116 eth_getenv_enetaddr("ethaddr", enetaddr);
117 do_fixup_by_path(blob, eth_path, "mac-address", enetaddr, 6, 0);
118 do_fixup_by_path(blob, eth_path, "local-mac-address", enetaddr, 6, 0);
120 #if defined(CONFIG_OF_IDE_FIXUP)
121 if (!ide_device_present(0)) {
122 /* NO CF card detected -> delete ata node in DTS */
124 char nodename[] = "/soc5200@f0000000/ata@3a00";
126 nodeoffset = fdt_path_offset(blob, nodename);
127 if (nodeoffset >= 0) {
128 fdt_del_node(blob, nodeoffset);
130 printf("%s: cannot find %s node err:%s\n",
131 __func__, nodename, fdt_strerror(nodeoffset));
136 fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
140 #ifdef CONFIG_MPC5xxx_FEC
141 /* Default initializations for FEC controllers. To override,
142 * create a board-specific function called:
143 * int board_eth_init(bd_t *bis)
146 int cpu_eth_init(bd_t *bis)
148 return mpc5xxx_fec_initialize(bis);
152 #if defined(CONFIG_WATCHDOG)
153 void watchdog_reset(void)
155 int re_enable = disable_interrupts();
156 reset_5xxx_watchdog();
157 if (re_enable) enable_interrupts();
160 void reset_5xxx_watchdog(void)
162 volatile struct mpc5xxx_gpt *gpt0 =
163 (struct mpc5xxx_gpt *) MPC5XXX_GPT;
165 /* Trigger TIMER_0 by writing A5 to OCPW */
166 clrsetbits_be32(&gpt0->emsr, 0xff000000, 0xa5000000);
168 #endif /* CONFIG_WATCHDOG */