blob: d1d0f1f493b46d5c03f6a8f423c21ba773e524fb (
plain) (
tree)
|
|
/*
* Big Endian PROM code for SNI RM machines
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2005-2006 Florian Lohoff (flo@rfc822.org)
* Copyright (C) 2005-2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/string.h>
#include <asm/addrspace.h>
#include <asm/sni.h>
#include <asm/mipsprom.h>
#include <asm/bootinfo.h>
/* special SNI prom calls */
/*
* This does not exist in all proms - SINIX compares
* the prom env variable "version" against "2.0008"
* or greater. If lesser it tries to probe interesting
* registers
*/
#define PROM_GET_MEMCONF 58
#define PROM_VEC (u64 *)CKSEG1ADDR(0x1fc00000)
#define PROM_ENTRY(x) (PROM_VEC + (x))
#undef DEBUG
#ifdef DEBUG
#define DBG_PRINTF(x...) prom_printf(x)
#else
#define DBG_PRINTF(x...)
#endif
static int *(*__prom_putchar)(int) = (int *(*)(int))PROM_ENTRY(PROM_PUTCHAR);
static char *(*__prom_getenv)(char *) = (char *(*)(char *))PROM_ENTRY(PROM_GETENV);
static void (*__prom_get_memconf)(void *) = (void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF);
char *prom_getenv (char *s)
{
return __prom_getenv(s);
}
void prom_printf(char *fmt, ...)
{
va_list args;
char ppbuf[1024];
char *bptr;
va_start(args, fmt);
vsprintf(ppbuf, fmt, args);
bptr = ppbuf;
while (*bptr != 0) {
if (*bptr == '\n')
__prom_putchar('\r');
__prom_putchar(*bptr++);
}
va_end(args);
}
unsigned long prom_free_prom_memory(void)
{
return 0;
}
/*
* /proc/cpuinfo system type
*
*/
static const char *systype = "Unknown";
const char *get_system_type(void)
{
return systype;
}
#define SNI_IDPROM_BASE 0xbff00000
#define SNI_IDPROM_MEMSIZE (SNI_IDPROM_BASE+0x28) /* Memsize in 16MB quantities */
#define SNI_IDPROM_BRDTYPE (SNI_IDPROM_BASE+0x29) /* Board Type */
#define SNI_IDPROM_CPUTYPE (SNI_IDPROM_BASE+0x30) /* CPU Type */
#define SNI_IDPROM_SIZE 0x1000
#ifdef DEBUG
static void sni_idprom_dump(void)
{
int i;
prom_printf("SNI IDProm dump (first 128byte):\n");
for(i=0;i<128;i++) {
if (i%16 == 0)
prom_printf("%04x ", i);
prom_printf("%02x ", *(unsigned char *) (SNI_IDPROM_BASE+i));
if (i%16 == 15)
prom_printf("\n");
}
}
#endif
static void sni_mem_init(void )
{
int i, memsize;
struct membank {
u32 size;
u32 base;
u32 size2;
u32 pad1;
u32 pad2;
} memconf[8];
/* MemSIZE from prom in 16MByte chunks */
memsize=*((unsigned char *) SNI_IDPROM_MEMSIZE) * 16;
DBG_PRINTF("IDProm memsize: %lu MByte\n", memsize);
/* get memory bank layout from prom */
__prom_get_memconf(&memconf);
DBG_PRINTF("prom_get_mem_conf memory configuration:\n");
for(i=0;i<8 && memconf[i].size;i++) {
prom_printf("Bank%d: %08x @ %08x\n", i,
memconf[i].size, memconf[i].base);
add_memory_region(memconf[i].base, memconf[i].size, BOOT_MEM_RAM);
}
}
void __init prom_init(void)
{
int argc = fw_arg0;
char **argv = (void *)fw_arg1;
unsigned int sni_brd_type = *(unsigned char *) SNI_IDPROM_BRDTYPE;
int i;
DBG_PRINTF("Found SNI brdtype %02x\n", sni_brd_type);
#ifdef DEBUG
sni_idprom_dump();
#endif
sni_mem_init();
/* copy prom cmdline parameters to kernel cmdline */
for (i = 1; i < argc; i++) {
strcat(arcs_cmdline, argv[i]);
if (i < (argc - 1))
strcat(arcs_cmdline, " ");
}
}
|
