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 /* O32 stack has to be 8-byte aligned. */ 44 static u64 o32_stk[4096]; 45 #define O32_STK &o32_stk[sizeof(o32_stk)] 46 47 #define __PROM_O32(fun, arg) fun arg __asm__(#fun); \ 48 __asm__(#fun " = call_o32") 49 50 int __PROM_O32(__prom_putchar, (int *(*)(int), void *, int)); 51 char *__PROM_O32(__prom_getenv, (char *(*)(char *), void *, char *)); 52 void __PROM_O32(__prom_get_memconf, (void (*)(void *), void *, void *)); 53 u32 __PROM_O32(__prom_get_hwconf, (u32 (*)(void), void *)); 54 55 #define _prom_putchar(x) __prom_putchar(___prom_putchar, O32_STK, x) 56 #define _prom_getenv(x) __prom_getenv(___prom_getenv, O32_STK, x) 57 #define _prom_get_memconf(x) __prom_get_memconf(___prom_get_memconf, O32_STK, x) 58 #define _prom_get_hwconf() __prom_get_hwconf(___prom_get_hwconf, O32_STK) 59 60 #else 61 #define _prom_putchar(x) ___prom_putchar(x) 62 #define _prom_getenv(x) ___prom_getenv(x) 63 #define _prom_get_memconf(x) ___prom_get_memconf(x) 64 #define _prom_get_hwconf(x) ___prom_get_hwconf(x) 65 #endif 66 67 void prom_putchar(char c) 68 { 69 _prom_putchar(c); 70 } 71 72 73 char *prom_getenv(char *s) 74 { 75 return _prom_getenv(s); 76 } 77 78 void *prom_get_hwconf(void) 79 { 80 u32 hwconf = _prom_get_hwconf(); 81 82 if (hwconf == 0xffffffff) 83 return NULL; 84 85 return (void *)CKSEG1ADDR(hwconf); 86 } 87 88 void __init prom_free_prom_memory(void) 89 { 90 } 91 92 /* 93 * /proc/cpuinfo system type 94 * 95 */ 96 char *system_type = "Unknown"; 97 const char *get_system_type(void) 98 { 99 return system_type; 100 } 101 102 static void __init sni_mem_init(void) 103 { 104 int i, memsize; 105 struct membank { 106 u32 size; 107 u32 base; 108 u32 size2; 109 u32 pad1; 110 u32 pad2; 111 } memconf[8]; 112 int brd_type = *(unsigned char *)SNI_IDPROM_BRDTYPE; 113 114 115 /* MemSIZE from prom in 16MByte chunks */ 116 memsize = *((unsigned char *) SNI_IDPROM_MEMSIZE) * 16; 117 118 pr_debug("IDProm memsize: %u MByte\n", memsize); 119 120 /* get memory bank layout from prom */ 121 _prom_get_memconf(&memconf); 122 123 pr_debug("prom_get_mem_conf memory configuration:\n"); 124 for (i = 0; i < 8 && memconf[i].size; i++) { 125 if (brd_type == SNI_BRD_PCI_TOWER || 126 brd_type == SNI_BRD_PCI_TOWER_CPLUS) { 127 if (memconf[i].base >= 0x20000000 && 128 memconf[i].base < 0x30000000) 129 memconf[i].base -= 0x20000000; 130 } 131 pr_debug("Bank%d: %08x @ %08x\n", i, 132 memconf[i].size, memconf[i].base); 133 add_memory_region(memconf[i].base, memconf[i].size, 134 BOOT_MEM_RAM); 135 } 136 } 137 138 void __init prom_init(void) 139 { 140 int argc = fw_arg0; 141 u32 *argv = (u32 *)CKSEG0ADDR(fw_arg1); 142 int i; 143 144 sni_mem_init(); 145 146 /* copy prom cmdline parameters to kernel cmdline */ 147 for (i = 1; i < argc; i++) { 148 strcat(arcs_cmdline, (char *)CKSEG0ADDR(argv[i])); 149 if (i < (argc - 1)) 150 strcat(arcs_cmdline, " "); 151 } 152 } 153