159 lines
3.4 KiB
C
159 lines
3.4 KiB
C
/*
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* Big Endian PROM code for SNI RM machines
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2005-2006 Florian Lohoff (flo@rfc822.org)
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* Copyright (C) 2005-2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <asm/addrspace.h>
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#include <asm/sni.h>
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#include <asm/mipsprom.h>
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#include <asm/bootinfo.h>
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/* special SNI prom calls */
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/*
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* This does not exist in all proms - SINIX compares
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* the prom env variable "version" against "2.0008"
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* or greater. If lesser it tries to probe interesting
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* registers
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*/
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#define PROM_GET_MEMCONF 58
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#define PROM_VEC (u64 *)CKSEG1ADDR(0x1fc00000)
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#define PROM_ENTRY(x) (PROM_VEC + (x))
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#undef DEBUG
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#ifdef DEBUG
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#define DBG_PRINTF(x...) prom_printf(x)
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#else
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#define DBG_PRINTF(x...)
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#endif
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static int *(*__prom_putchar)(int) = (int *(*)(int))PROM_ENTRY(PROM_PUTCHAR);
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static char *(*__prom_getenv)(char *) = (char *(*)(char *))PROM_ENTRY(PROM_GETENV);
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static void (*__prom_get_memconf)(void *) = (void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF);
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char *prom_getenv (char *s)
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{
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return __prom_getenv(s);
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}
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void prom_printf(char *fmt, ...)
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{
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va_list args;
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char ppbuf[1024];
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char *bptr;
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va_start(args, fmt);
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vsprintf(ppbuf, fmt, args);
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bptr = ppbuf;
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while (*bptr != 0) {
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if (*bptr == '\n')
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__prom_putchar('\r');
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__prom_putchar(*bptr++);
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}
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va_end(args);
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}
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unsigned long prom_free_prom_memory(void)
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{
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return 0;
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}
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/*
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* /proc/cpuinfo system type
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*
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*/
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static const char *systype = "Unknown";
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const char *get_system_type(void)
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{
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return systype;
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}
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#define SNI_IDPROM_BASE 0xbff00000
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#define SNI_IDPROM_MEMSIZE (SNI_IDPROM_BASE+0x28) /* Memsize in 16MB quantities */
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#define SNI_IDPROM_BRDTYPE (SNI_IDPROM_BASE+0x29) /* Board Type */
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#define SNI_IDPROM_CPUTYPE (SNI_IDPROM_BASE+0x30) /* CPU Type */
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#define SNI_IDPROM_SIZE 0x1000
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#ifdef DEBUG
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static void sni_idprom_dump(void)
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{
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int i;
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prom_printf("SNI IDProm dump (first 128byte):\n");
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for(i=0;i<128;i++) {
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if (i%16 == 0)
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prom_printf("%04x ", i);
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prom_printf("%02x ", *(unsigned char *) (SNI_IDPROM_BASE+i));
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if (i%16 == 15)
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prom_printf("\n");
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}
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}
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#endif
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static void sni_mem_init(void )
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{
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int i, memsize;
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struct membank {
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u32 size;
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u32 base;
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u32 size2;
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u32 pad1;
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u32 pad2;
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} memconf[8];
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/* MemSIZE from prom in 16MByte chunks */
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memsize=*((unsigned char *) SNI_IDPROM_MEMSIZE) * 16;
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DBG_PRINTF("IDProm memsize: %lu MByte\n", memsize);
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/* get memory bank layout from prom */
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__prom_get_memconf(&memconf);
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DBG_PRINTF("prom_get_mem_conf memory configuration:\n");
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for(i=0;i<8 && memconf[i].size;i++) {
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prom_printf("Bank%d: %08x @ %08x\n", i,
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memconf[i].size, memconf[i].base);
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add_memory_region(memconf[i].base, memconf[i].size, BOOT_MEM_RAM);
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}
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}
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void __init prom_init(void)
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{
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int argc = fw_arg0;
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char **argv = (void *)fw_arg1;
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unsigned int sni_brd_type = *(unsigned char *) SNI_IDPROM_BRDTYPE;
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int i;
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DBG_PRINTF("Found SNI brdtype %02x\n", sni_brd_type);
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#ifdef DEBUG
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sni_idprom_dump();
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#endif
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sni_mem_init();
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/* copy prom cmdline parameters to kernel cmdline */
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for (i = 1; i < argc; i++) {
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strcat(arcs_cmdline, argv[i]);
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if (i < (argc - 1))
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strcat(arcs_cmdline, " ");
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}
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}
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