arch/powerpc/boot/ep405.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Embedded Planet EP405 with PlanetCore firmware
   4  *
   5  * (c) Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp,\
   6  *
   7  * Based on ep88xc.c by
   8  *
   9  * Scott Wood <scottwood@freescale.com>
  10  *
  11  * Copyright (c) 2007 Freescale Semiconductor, Inc.
  12  */
  13
  14 #include "ops.h"
  15 #include "stdio.h"
  16 #include "planetcore.h"
  17 #include "dcr.h"
  18 #include "4xx.h"
  19 #include "io.h"
  20
  21 static char *table;
  22 static u64 mem_size;
  23
  24 static void platform_fixups(void)
  25 {
  26         u64 val;
  27         void *nvrtc;
  28
  29         dt_fixup_memory(0, mem_size);
  30         planetcore_set_mac_addrs(table);
  31
  32         if (!planetcore_get_decimal(table, PLANETCORE_KEY_CRYSTAL_HZ, &val)) {
  33                 printf("No PlanetCore crystal frequency key.\r\n");
  34                 return;
  35         }
  36         ibm405gp_fixup_clocks(val, 0xa8c000);
  37         ibm4xx_quiesce_eth((u32 *)0xef600800, NULL);
  38         ibm4xx_fixup_ebc_ranges("/plb/ebc");
  39
  40         if (!planetcore_get_decimal(table, PLANETCORE_KEY_KB_NVRAM, &val)) {
  41                 printf("No PlanetCore NVRAM size key.\r\n");
  42                 return;
  43         }
  44         nvrtc = finddevice("/plb/ebc/nvrtc@4,200000");
  45         if (nvrtc != NULL) {
  46                 u32 reg[3] = { 4, 0x200000, 0};
  47                 getprop(nvrtc, "reg", reg, 3);
  48                 reg[2] = (val << 10) & 0xffffffff;
  49                 setprop(nvrtc, "reg", reg, 3);
  50         }
  51 }
  52
  53 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
  54                    unsigned long r6, unsigned long r7)
  55 {
  56         table = (char *)r3;
  57         planetcore_prepare_table(table);
  58
  59         if (!planetcore_get_decimal(table, PLANETCORE_KEY_MB_RAM, &mem_size))
  60                 return;
  61
  62         mem_size *= 1024 * 1024;
  63         simple_alloc_init(_end, mem_size - (unsigned long)_end, 32, 64);
  64
  65         fdt_init(_dtb_start);
  66
  67         planetcore_set_stdout_path(table);
  68
  69         serial_console_init();
  70         platform_ops.fixups = platform_fixups;
  71 }