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 #include <asm/setup.h> 23 24 /* special SNI prom calls */ 25 /* 26 * This does not exist in all proms - SINIX compares 27 * the prom env variable "version" against "2.0008" 28 * or greater. If lesser it tries to probe interesting 29 * registers 30 */ 31 #define PROM_GET_MEMCONF 58 32 #define PROM_GET_HWCONF 61 33 34 #define PROM_VEC (u64 *)CKSEG1ADDR(0x1fc00000) 35 #define PROM_ENTRY(x) (PROM_VEC + (x)) 36 37 #define ___prom_putchar ((int *(*)(int))PROM_ENTRY(PROM_PUTCHAR)) 38 #define ___prom_getenv ((char *(*)(char *))PROM_ENTRY(PROM_GETENV)) 39 #define ___prom_get_memconf ((void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF)) 40 #define ___prom_get_hwconf ((u32 (*)(void))PROM_ENTRY(PROM_GET_HWCONF)) 41 42 #ifdef CONFIG_64BIT 43 44 /* O32 stack has to be 8-byte aligned. */ 45 static u64 o32_stk[4096]; 46 #define O32_STK &o32_stk[sizeof(o32_stk)] 47 48 #define __PROM_O32(fun, arg) fun arg __asm__(#fun); \ 49 __asm__(#fun " = call_o32") 50 51 int __PROM_O32(__prom_putchar, (int *(*)(int), void *, int)); 52 char *__PROM_O32(__prom_getenv, (char *(*)(char *), void *, char *)); 53 void __PROM_O32(__prom_get_memconf, (void (*)(void *), void *, void *)); 54 u32 __PROM_O32(__prom_get_hwconf, (u32 (*)(void), void *)); 55 56 #define _prom_putchar(x) __prom_putchar(___prom_putchar, O32_STK, x) 57 #define _prom_getenv(x) __prom_getenv(___prom_getenv, O32_STK, x) 58 #define _prom_get_memconf(x) __prom_get_memconf(___prom_get_memconf, O32_STK, x) 59 #define _prom_get_hwconf() __prom_get_hwconf(___prom_get_hwconf, O32_STK) 60 61 #else 62 #define _prom_putchar(x) ___prom_putchar(x) 63 #define _prom_getenv(x) ___prom_getenv(x) 64 #define _prom_get_memconf(x) ___prom_get_memconf(x) 65 #define _prom_get_hwconf(x) ___prom_get_hwconf(x) 66 #endif 67 68 void prom_putchar(char c) 69 { 70 _prom_putchar(c); 71 } 72 73 74 char *prom_getenv(char *s) 75 { 76 return _prom_getenv(s); 77 } 78 79 void *prom_get_hwconf(void) 80 { 81 u32 hwconf = _prom_get_hwconf(); 82 83 if (hwconf == 0xffffffff) 84 return NULL; 85 86 return (void *)CKSEG1ADDR(hwconf); 87 } 88 89 void __init prom_free_prom_memory(void) 90 { 91 } 92 93 /* 94 * /proc/cpuinfo system type 95 * 96 */ 97 char *system_type = "Unknown"; 98 const char *get_system_type(void) 99 { 100 return system_type; 101 } 102 103 static void __init sni_mem_init(void) 104 { 105 int i, memsize; 106 struct membank { 107 u32 size; 108 u32 base; 109 u32 size2; 110 u32 pad1; 111 u32 pad2; 112 } memconf[8]; 113 int brd_type = *(unsigned char *)SNI_IDPROM_BRDTYPE; 114 115 116 /* MemSIZE from prom in 16MByte chunks */ 117 memsize = *((unsigned char *) SNI_IDPROM_MEMSIZE) * 16; 118 119 pr_debug("IDProm memsize: %u MByte\n", memsize); 120 121 /* get memory bank layout from prom */ 122 _prom_get_memconf(&memconf); 123 124 pr_debug("prom_get_mem_conf memory configuration:\n"); 125 for (i = 0; i < 8 && memconf[i].size; i++) { 126 if (brd_type == SNI_BRD_PCI_TOWER || 127 brd_type == SNI_BRD_PCI_TOWER_CPLUS) { 128 if (memconf[i].base >= 0x20000000 && 129 memconf[i].base < 0x30000000) 130 memconf[i].base -= 0x20000000; 131 } 132 pr_debug("Bank%d: %08x @ %08x\n", i, 133 memconf[i].size, memconf[i].base); 134 add_memory_region(memconf[i].base, memconf[i].size, 135 BOOT_MEM_RAM); 136 } 137 } 138 139 void __init prom_init(void) 140 { 141 int argc = fw_arg0; 142 u32 *argv = (u32 *)CKSEG0ADDR(fw_arg1); 143 int i; 144 145 sni_mem_init(); 146 147 /* copy prom cmdline parameters to kernel cmdline */ 148 for (i = 1; i < argc; i++) { 149 strcat(arcs_cmdline, (char *)CKSEG0ADDR(argv[i])); 150 if (i < (argc - 1)) 151 strcat(arcs_cmdline, " "); 152 } 153 } 154