diff options
Diffstat (limited to 'arch/mips/ddb5xxx/common/prom.c')
| -rw-r--r-- | arch/mips/ddb5xxx/common/prom.c | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/arch/mips/ddb5xxx/common/prom.c b/arch/mips/ddb5xxx/common/prom.c deleted file mode 100644 index 54a857b5e3ba..000000000000 --- a/arch/mips/ddb5xxx/common/prom.c +++ /dev/null | |||
| @@ -1,132 +0,0 @@ | |||
| 1 | /* | ||
| 2 | * Copyright 2001 MontaVista Software Inc. | ||
| 3 | * Author: jsun@mvista.com or jsun@junsun.net | ||
| 4 | * | ||
| 5 | * This program is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License as published by the | ||
| 7 | * Free Software Foundation; either version 2 of the License, or (at your | ||
| 8 | * option) any later version. | ||
| 9 | */ | ||
| 10 | #include <linux/init.h> | ||
| 11 | #include <linux/mm.h> | ||
| 12 | #include <linux/sched.h> | ||
| 13 | #include <linux/bootmem.h> | ||
| 14 | |||
| 15 | #include <asm/addrspace.h> | ||
| 16 | #include <asm/bootinfo.h> | ||
| 17 | #include <asm/ddb5xxx/ddb5xxx.h> | ||
| 18 | #include <asm/debug.h> | ||
| 19 | |||
| 20 | const char *get_system_type(void) | ||
| 21 | { | ||
| 22 | switch (mips_machtype) { | ||
| 23 | case MACH_NEC_DDB5477: return "NEC DDB Vrc-5477"; | ||
| 24 | case MACH_NEC_ROCKHOPPER: return "NEC Rockhopper"; | ||
| 25 | case MACH_NEC_ROCKHOPPERII: return "NEC RockhopperII"; | ||
| 26 | default: return "Unknown NEC board"; | ||
| 27 | } | ||
| 28 | } | ||
| 29 | |||
| 30 | #if defined(CONFIG_DDB5477) | ||
| 31 | void ddb5477_runtime_detection(void); | ||
| 32 | #endif | ||
| 33 | |||
| 34 | /* [jsun@junsun.net] PMON passes arguments in C main() style */ | ||
| 35 | void __init prom_init(void) | ||
| 36 | { | ||
| 37 | int argc = fw_arg0; | ||
| 38 | char **arg = (char**) fw_arg1; | ||
| 39 | int i; | ||
| 40 | |||
| 41 | /* if user passes kernel args, ignore the default one */ | ||
| 42 | if (argc > 1) | ||
| 43 | arcs_cmdline[0] = '\0'; | ||
| 44 | |||
| 45 | /* arg[0] is "g", the rest is boot parameters */ | ||
| 46 | for (i = 1; i < argc; i++) { | ||
| 47 | if (strlen(arcs_cmdline) + strlen(arg[i] + 1) | ||
| 48 | >= sizeof(arcs_cmdline)) | ||
| 49 | break; | ||
| 50 | strcat(arcs_cmdline, arg[i]); | ||
| 51 | strcat(arcs_cmdline, " "); | ||
| 52 | } | ||
| 53 | |||
| 54 | mips_machgroup = MACH_GROUP_NEC_DDB; | ||
| 55 | |||
| 56 | #if defined(CONFIG_DDB5477) | ||
| 57 | ddb5477_runtime_detection(); | ||
| 58 | add_memory_region(0, board_ram_size, BOOT_MEM_RAM); | ||
| 59 | #endif | ||
| 60 | } | ||
| 61 | |||
| 62 | void __init prom_free_prom_memory(void) | ||
| 63 | { | ||
| 64 | } | ||
| 65 | |||
| 66 | #if defined(CONFIG_DDB5477) | ||
| 67 | |||
| 68 | #define DEFAULT_LCS1_BASE 0x19000000 | ||
| 69 | #define TESTVAL1 'K' | ||
| 70 | #define TESTVAL2 'S' | ||
| 71 | |||
| 72 | int board_ram_size; | ||
| 73 | void ddb5477_runtime_detection(void) | ||
| 74 | { | ||
| 75 | volatile char *test_offset; | ||
| 76 | char saved_test_byte; | ||
| 77 | |||
| 78 | /* Determine if this is a DDB5477 board, or a BSB-VR0300 | ||
| 79 | base board. We can tell by checking for the location of | ||
| 80 | the NVRAM. It lives at the beginning of LCS1 on the DDB5477, | ||
| 81 | and the beginning of LCS1 on the BSB-VR0300 is flash memory. | ||
| 82 | The first 2K of the NVRAM are reserved, so don't we'll poke | ||
| 83 | around just after that. | ||
| 84 | */ | ||
| 85 | |||
| 86 | /* We can only use the PCI bus to distinquish between | ||
| 87 | the Rockhopper and RockhopperII backplanes and this must | ||
| 88 | wait until ddb5477_board_init() in setup.c after the 5477 | ||
| 89 | is initialized. So, until then handle | ||
| 90 | both Rockhopper and RockhopperII backplanes as Rockhopper 1 | ||
| 91 | */ | ||
| 92 | |||
| 93 | test_offset = (char *)KSEG1ADDR(DEFAULT_LCS1_BASE + 0x800); | ||
| 94 | saved_test_byte = *test_offset; | ||
| 95 | |||
| 96 | *test_offset = TESTVAL1; | ||
| 97 | if (*test_offset != TESTVAL1) { | ||
| 98 | /* We couldn't set our test value, so it must not be NVRAM, | ||
| 99 | so it's a BSB_VR0300 */ | ||
| 100 | mips_machtype = MACH_NEC_ROCKHOPPER; | ||
| 101 | } else { | ||
| 102 | /* We may have gotten lucky, and the TESTVAL1 was already | ||
| 103 | stored at the test location, so we must check a second | ||
| 104 | test value */ | ||
| 105 | *test_offset = TESTVAL2; | ||
| 106 | if (*test_offset != TESTVAL2) { | ||
| 107 | /* OK, we couldn't set this value either, so it must | ||
| 108 | definately be a BSB_VR0300 */ | ||
| 109 | mips_machtype = MACH_NEC_ROCKHOPPER; | ||
| 110 | } else { | ||
| 111 | /* We could change the value twice, so it must be | ||
| 112 | NVRAM, so it's a DDB_VRC5477 */ | ||
| 113 | mips_machtype = MACH_NEC_DDB5477; | ||
| 114 | } | ||
| 115 | } | ||
| 116 | /* Restore the original byte */ | ||
| 117 | *test_offset = saved_test_byte; | ||
| 118 | |||
| 119 | /* before we know a better way, we will trust PMON for getting | ||
| 120 | * RAM size | ||
| 121 | */ | ||
| 122 | board_ram_size = 1 << (36 - (ddb_in32(DDB_SDRAM0) & 0xf)); | ||
| 123 | |||
| 124 | db_run(printk("DDB run-time detection : %s, %d MB RAM\n", | ||
| 125 | mips_machtype == MACH_NEC_DDB5477 ? | ||
| 126 | "DDB5477" : "Rockhopper", | ||
| 127 | board_ram_size >> 20)); | ||
| 128 | |||
| 129 | /* we can't handle ram size > 128 MB */ | ||
| 130 | db_assert(board_ram_size <= (128 << 20)); | ||
| 131 | } | ||
| 132 | #endif | ||