153 lines
3.8 KiB
C
153 lines
3.8 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 <linux/console.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/mipsregs.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_GET_HWCONF 61
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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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#define ___prom_putchar ((int *(*)(int))PROM_ENTRY(PROM_PUTCHAR))
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#define ___prom_getenv ((char *(*)(char *))PROM_ENTRY(PROM_GETENV))
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#define ___prom_get_memconf ((void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF))
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#define ___prom_get_hwconf ((u32 (*)(void))PROM_ENTRY(PROM_GET_HWCONF))
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#ifdef CONFIG_64BIT
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/* O32 stack has to be 8-byte aligned. */
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static u64 o32_stk[4096];
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#define O32_STK (&o32_stk[ARRAY_SIZE(o32_stk)])
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#define __PROM_O32(fun, arg) fun arg __asm__(#fun); \
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__asm__(#fun " = call_o32")
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int __PROM_O32(__prom_putchar, (int *(*)(int), void *, int));
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char *__PROM_O32(__prom_getenv, (char *(*)(char *), void *, char *));
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void __PROM_O32(__prom_get_memconf, (void (*)(void *), void *, void *));
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u32 __PROM_O32(__prom_get_hwconf, (u32 (*)(void), void *));
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#define _prom_putchar(x) __prom_putchar(___prom_putchar, O32_STK, x)
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#define _prom_getenv(x) __prom_getenv(___prom_getenv, O32_STK, x)
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#define _prom_get_memconf(x) __prom_get_memconf(___prom_get_memconf, O32_STK, x)
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#define _prom_get_hwconf() __prom_get_hwconf(___prom_get_hwconf, O32_STK)
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#else
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#define _prom_putchar(x) ___prom_putchar(x)
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#define _prom_getenv(x) ___prom_getenv(x)
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#define _prom_get_memconf(x) ___prom_get_memconf(x)
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#define _prom_get_hwconf(x) ___prom_get_hwconf(x)
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#endif
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void prom_putchar(char c)
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{
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_prom_putchar(c);
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}
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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_get_hwconf(void)
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{
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u32 hwconf = _prom_get_hwconf();
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if (hwconf == 0xffffffff)
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return NULL;
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return (void *)CKSEG1ADDR(hwconf);
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}
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void __init prom_free_prom_memory(void)
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{
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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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char *system_type = "Unknown";
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const char *get_system_type(void)
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{
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return system_type;
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}
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static void __init 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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int brd_type = *(unsigned char *)SNI_IDPROM_BRDTYPE;
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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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pr_debug("IDProm memsize: %u 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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pr_debug("prom_get_mem_conf memory configuration:\n");
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for (i = 0; i < 8 && memconf[i].size; i++) {
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if (brd_type == SNI_BRD_PCI_TOWER ||
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brd_type == SNI_BRD_PCI_TOWER_CPLUS) {
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if (memconf[i].base >= 0x20000000 &&
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memconf[i].base < 0x30000000)
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memconf[i].base -= 0x20000000;
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}
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pr_debug("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,
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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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u32 *argv = (u32 *)CKSEG0ADDR(fw_arg1);
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int i;
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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, (char *)CKSEG0ADDR(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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