1 /* 2 * Big Endian PROM code for SNI RM machines 3 * 4 * This file is subject to the terms and conditions of the GNU General Public 5 * License. See the file "COPYING" in the main directory of this archive 6 * for more details. 7 * 8 * Copyright (C) 2005-2006 Florian Lohoff (flo@rfc822.org) 9 * Copyright (C) 2005-2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de) 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/init.h> 14 #include <linux/string.h> 15 #include <linux/console.h> 16 17 #include <asm/addrspace.h> 18 #include <asm/sni.h> 19 #include <asm/mipsprom.h> 20 #include <asm/mipsregs.h> 21 #include <asm/bootinfo.h> 22 23 /* special SNI prom calls */ 24 /* 25 * This does not exist in all proms - SINIX compares 26 * the prom env variable "version" against "2.0008" 27 * or greater. If lesser it tries to probe interesting 28 * registers 29 */ 30 #define PROM_GET_MEMCONF 58 31 #define PROM_GET_HWCONF 61 32 33 #define PROM_VEC (u64 *)CKSEG1ADDR(0x1fc00000) 34 #define PROM_ENTRY(x) (PROM_VEC + (x)) 35 36 #define ___prom_putchar ((int *(*)(int))PROM_ENTRY(PROM_PUTCHAR)) 37 #define ___prom_getenv ((char *(*)(char *))PROM_ENTRY(PROM_GETENV)) 38 #define ___prom_get_memconf ((void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF)) 39 #define ___prom_get_hwconf ((u32 (*)(void))PROM_ENTRY(PROM_GET_HWCONF)) 40 41 #ifdef CONFIG_64BIT 42 43 static u8 o32_stk[16384]; 44 #define O32_STK &o32_stk[sizeof(o32_stk)] 45 46 #define __PROM_O32(fun, arg) fun arg __asm__(#fun); \ 47 __asm__(#fun " = call_o32") 48 49 int __PROM_O32(__prom_putchar, (int *(*)(int), void *, int)); 50 char *__PROM_O32(__prom_getenv, (char *(*)(char *), void *, char *)); 51 void __PROM_O32(__prom_get_memconf, (void (*)(void *), void *, void *)); 52 u32 __PROM_O32(__prom_get_hwconf, (u32 (*)(void), void *)); 53 54 #define _prom_putchar(x) __prom_putchar(___prom_putchar, O32_STK, x) 55 #define _prom_getenv(x) __prom_getenv(___prom_getenv, O32_STK, x) 56 #define _prom_get_memconf(x) __prom_get_memconf(___prom_get_memconf, O32_STK, x) 57 #define _prom_get_hwconf() __prom_get_hwconf(___prom_get_hwconf, O32_STK) 58 59 #else 60 #define _prom_putchar(x) ___prom_putchar(x) 61 #define _prom_getenv(x) ___prom_getenv(x) 62 #define _prom_get_memconf(x) ___prom_get_memconf(x) 63 #define _prom_get_hwconf(x) ___prom_get_hwconf(x) 64 #endif 65 66 void prom_putchar(char c) 67 { 68 _prom_putchar(c); 69 } 70 71 72 char *prom_getenv(char *s) 73 { 74 return _prom_getenv(s); 75 } 76 77 void *prom_get_hwconf(void) 78 { 79 u32 hwconf = _prom_get_hwconf(); 80 81 if (hwconf == 0xffffffff) 82 return NULL; 83 84 return (void *)CKSEG1ADDR(hwconf); 85 } 86 87 void __init prom_free_prom_memory(void) 88 { 89 } 90 91 /* 92 * /proc/cpuinfo system type 93 * 94 */ 95 char *system_type = "Unknown"; 96 const char *get_system_type(void) 97 { 98 return system_type; 99 } 100 101 static void __init sni_mem_init(void) 102 { 103 int i, memsize; 104 struct membank { 105 u32 size; 106 u32 base; 107 u32 size2; 108 u32 pad1; 109 u32 pad2; 110 } memconf[8]; 111 int brd_type = *(unsigned char *)SNI_IDPROM_BRDTYPE; 112 113 114 /* MemSIZE from prom in 16MByte chunks */ 115 memsize = *((unsigned char *) SNI_IDPROM_MEMSIZE) * 16; 116 117 pr_debug("IDProm memsize: %u MByte\n", memsize); 118 119 /* get memory bank layout from prom */ 120 _prom_get_memconf(&memconf); 121 122 pr_debug("prom_get_mem_conf memory configuration:\n"); 123 for (i = 0; i < 8 && memconf[i].size; i++) { 124 if (brd_type == SNI_BRD_PCI_TOWER || 125 brd_type == SNI_BRD_PCI_TOWER_CPLUS) { 126 if (memconf[i].base >= 0x20000000 && 127 memconf[i].base < 0x30000000) 128 memconf[i].base -= 0x20000000; 129 } 130 pr_debug("Bank%d: %08x @ %08x\n", i, 131 memconf[i].size, memconf[i].base); 132 add_memory_region(memconf[i].base, memconf[i].size, 133 BOOT_MEM_RAM); 134 } 135 } 136 137 void __init prom_init(void) 138 { 139 int argc = fw_arg0; 140 u32 *argv = (u32 *)CKSEG0ADDR(fw_arg1); 141 int i; 142 143 sni_mem_init(); 144 145 /* copy prom cmdline parameters to kernel cmdline */ 146 for (i = 1; i < argc; i++) { 147 strcat(arcs_cmdline, (char *)CKSEG0ADDR(argv[i])); 148 if (i < (argc - 1)) 149 strcat(arcs_cmdline, " "); 150 } 151 } 152