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/memblock.h> 15 #include <linux/string.h> 16 #include <linux/console.h> 17 18 #include <asm/addrspace.h> 19 #include <asm/sni.h> 20 #include <asm/mipsprom.h> 21 #include <asm/mipsregs.h> 22 #include <asm/bootinfo.h> 23 #include <asm/setup.h> 24 25 /* special SNI prom calls */ 26 /* 27 * This does not exist in all proms - SINIX compares 28 * the prom env variable "version" against "2.0008" 29 * or greater. If lesser it tries to probe interesting 30 * registers 31 */ 32 #define PROM_GET_MEMCONF 58 33 #define PROM_GET_HWCONF 61 34 35 #define PROM_VEC (u64 *)CKSEG1ADDR(0x1fc00000) 36 #define PROM_ENTRY(x) (PROM_VEC + (x)) 37 38 #define ___prom_putchar ((int *(*)(int))PROM_ENTRY(PROM_PUTCHAR)) 39 #define ___prom_getenv ((char *(*)(char *))PROM_ENTRY(PROM_GETENV)) 40 #define ___prom_get_memconf ((void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF)) 41 #define ___prom_get_hwconf ((u32 (*)(void))PROM_ENTRY(PROM_GET_HWCONF)) 42 43 #ifdef CONFIG_64BIT 44 45 /* O32 stack has to be 8-byte aligned. */ 46 static u64 o32_stk[4096]; 47 #define O32_STK (&o32_stk[ARRAY_SIZE(o32_stk)]) 48 49 #define __PROM_O32(fun, arg) fun arg __asm__(#fun); \ 50 __asm__(#fun " = call_o32") 51 52 int __PROM_O32(__prom_putchar, (int *(*)(int), void *, int)); 53 char *__PROM_O32(__prom_getenv, (char *(*)(char *), void *, char *)); 54 void __PROM_O32(__prom_get_memconf, (void (*)(void *), void *, void *)); 55 u32 __PROM_O32(__prom_get_hwconf, (u32 (*)(void), void *)); 56 57 #define _prom_putchar(x) __prom_putchar(___prom_putchar, O32_STK, x) 58 #define _prom_getenv(x) __prom_getenv(___prom_getenv, O32_STK, x) 59 #define _prom_get_memconf(x) __prom_get_memconf(___prom_get_memconf, O32_STK, x) 60 #define _prom_get_hwconf() __prom_get_hwconf(___prom_get_hwconf, O32_STK) 61 62 #else 63 #define _prom_putchar(x) ___prom_putchar(x) 64 #define _prom_getenv(x) ___prom_getenv(x) 65 #define _prom_get_memconf(x) ___prom_get_memconf(x) 66 #define _prom_get_hwconf(x) ___prom_get_hwconf(x) 67 #endif 68 69 void prom_putchar(char c) 70 { 71 _prom_putchar(c); 72 } 73 74 75 char *prom_getenv(char *s) 76 { 77 return _prom_getenv(s); 78 } 79 80 void *prom_get_hwconf(void) 81 { 82 u32 hwconf = _prom_get_hwconf(); 83 84 if (hwconf == 0xffffffff) 85 return NULL; 86 87 return (void *)CKSEG1ADDR(hwconf); 88 } 89 90 /* 91 * /proc/cpuinfo system type 92 * 93 */ 94 char *system_type = "Unknown"; 95 const char *get_system_type(void) 96 { 97 return system_type; 98 } 99 100 static void __init sni_mem_init(void) 101 { 102 int i, memsize; 103 struct membank { 104 u32 size; 105 u32 base; 106 u32 size2; 107 u32 pad1; 108 u32 pad2; 109 } memconf[8]; 110 int brd_type = *(unsigned char *)SNI_IDPROM_BRDTYPE; 111 112 113 /* MemSIZE from prom in 16MByte chunks */ 114 memsize = *((unsigned char *) SNI_IDPROM_MEMSIZE) * 16; 115 116 pr_debug("IDProm memsize: %u MByte\n", memsize); 117 118 /* get memory bank layout from prom */ 119 _prom_get_memconf(&memconf); 120 121 pr_debug("prom_get_mem_conf memory configuration:\n"); 122 for (i = 0; i < 8 && memconf[i].size; i++) { 123 if (brd_type == SNI_BRD_PCI_TOWER || 124 brd_type == SNI_BRD_PCI_TOWER_CPLUS) { 125 if (memconf[i].base >= 0x20000000 && 126 memconf[i].base < 0x30000000) 127 memconf[i].base -= 0x20000000; 128 } 129 pr_debug("Bank%d: %08x @ %08x\n", i, 130 memconf[i].size, memconf[i].base); 131 memblock_add(memconf[i].base, memconf[i].size); 132 } 133 } 134 135 void __init prom_init(void) 136 { 137 int argc = fw_arg0; 138 u32 *argv = (u32 *)CKSEG0ADDR(fw_arg1); 139 int i; 140 141 sni_mem_init(); 142 143 /* copy prom cmdline parameters to kernel cmdline */ 144 for (i = 1; i < argc; i++) { 145 strcat(arcs_cmdline, (char *)CKSEG0ADDR(argv[i])); 146 if (i < (argc - 1)) 147 strcat(arcs_cmdline, " "); 148 } 149 } 150