[MIPS] Support SNI RM200C SNI in big endian mode and R5000 processors.

Added support for RM200C machines with big endian firmware
Added support for RM200-C40 (R5000 support)
    
Signed-off-by: Florian Lohoff <flo@rfc822.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/sni/sniprom.c

@@ -0,0 +1,158 @@
+/*
+ * 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, " ");
+	}
+}
+