[MIPS] RM: Collected changes

- EISA support for non PCI RMs (RM200 and RM400-xxx). The major part
  is the splitting of the EISA and onboard ISA of the RM200, which
  makes the EISA bus on the RM200 look like on other RMs.
- 64bit kernel support
- system type detection is now common for big and little endian
- moved sniprom code to arch/mips/fw
- added call_o32 function to arch/mips/fw/lib, which uses a private
  stack for calling prom functions
- fix problem with ISA interrupts, which makes using PIT clockevent
  possible

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 156 insertions, 0 deletions

diff --git a/arch/mips/fw/sni/Makefile b/arch/mips/fw/sni/Makefile
new file mode 100644
index 00000000000..d9740a3788e
--- /dev/null
+++ b/arch/mips/fw/sni/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the SNI prom monitor routines under Linux.
+#
+
+lib-$(CONFIG_SNIPROM)	+= sniprom.o
diff --git a/arch/mips/fw/sni/sniprom.c b/arch/mips/fw/sni/sniprom.c
new file mode 100644
index 00000000000..96ba9920275
--- /dev/null
+++ b/arch/mips/fw/sni/sniprom.c
@@ -0,0 +1,151 @@
+/*
+ * 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 <linux/console.h>
+
+#include <asm/addrspace.h>
+#include <asm/sni.h>
+#include <asm/mipsprom.h>
+#include <asm/mipsregs.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_GET_HWCONF         61
+
+#define PROM_VEC		(u64 *)CKSEG1ADDR(0x1fc00000)
+#define PROM_ENTRY(x)		(PROM_VEC + (x))
+
+#define ___prom_putchar         ((int *(*)(int))PROM_ENTRY(PROM_PUTCHAR))
+#define ___prom_getenv          ((char *(*)(char *))PROM_ENTRY(PROM_GETENV))
+#define ___prom_get_memconf     ((void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF))
+#define ___prom_get_hwconf      ((u32 (*)(void))PROM_ENTRY(PROM_GET_HWCONF))
+
+#ifdef CONFIG_64BIT
+
+static u8 o32_stk[16384];
+#define O32_STK   &o32_stk[sizeof(o32_stk)]
+
+#define __PROM_O32(fun, arg) fun arg __asm__(#fun); \
+				     __asm__(#fun " = call_o32")
+
+int   __PROM_O32(__prom_putchar, (int *(*)(int), void *, int));
+char *__PROM_O32(__prom_getenv, (char *(*)(char *), void *, char *));
+void  __PROM_O32(__prom_get_memconf, (void (*)(void *), void *, void *));
+u32   __PROM_O32(__prom_get_hwconf, (u32 (*)(void), void *));
+
+#define _prom_putchar(x)     __prom_putchar(___prom_putchar, O32_STK, x)
+#define _prom_getenv(x)      __prom_getenv(___prom_getenv, O32_STK, x)
+#define _prom_get_memconf(x) __prom_get_memconf(___prom_get_memconf, O32_STK, x)
+#define _prom_get_hwconf()   __prom_get_hwconf(___prom_get_hwconf, O32_STK)
+
+#else
+#define _prom_putchar(x)     ___prom_putchar(x)
+#define _prom_getenv(x)      ___prom_getenv(x)
+#define _prom_get_memconf(x) ___prom_get_memconf(x)
+#define _prom_get_hwconf(x)  ___prom_get_hwconf(x)
+#endif
+
+void prom_putchar(char c)
+{
+	_prom_putchar(c);
+}
+
+
+char *prom_getenv(char *s)
+{
+	return _prom_getenv(s);
+}
+
+void *prom_get_hwconf(void)
+{
+	u32 hwconf = _prom_get_hwconf();
+
+	if (hwconf == 0xffffffff)
+		return NULL;
+
+	return (void *)CKSEG1ADDR(hwconf);
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
+
+/*
+ * /proc/cpuinfo system type
+ *
+ */
+char *system_type = "Unknown";
+const char *get_system_type(void)
+{
+	return system_type;
+}
+
+static void __init sni_mem_init(void)
+{
+	int i, memsize;
+	struct membank {
+		u32		size;
+		u32		base;
+		u32		size2;
+		u32		pad1;
+		u32		pad2;
+	} memconf[8];
+	int brd_type = *(unsigned char *)SNI_IDPROM_BRDTYPE;
+
+
+	/* MemSIZE from prom in 16MByte chunks */
+	memsize = *((unsigned char *) SNI_IDPROM_MEMSIZE) * 16;
+
+	pr_debug("IDProm memsize: %u MByte\n", memsize);
+
+	/* get memory bank layout from prom */
+	_prom_get_memconf(&memconf);
+
+	pr_debug("prom_get_mem_conf memory configuration:\n");
+	for (i = 0; i < 8 && memconf[i].size; i++) {
+		if (brd_type == SNI_BRD_PCI_TOWER ||
+		    brd_type == SNI_BRD_PCI_TOWER_CPLUS) {
+			if (memconf[i].base >= 0x20000000 &&
+			    memconf[i].base <  0x30000000)
+				memconf[i].base -= 0x20000000;
+		}
+		pr_debug("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;
+	u32 *argv = (u32 *)CKSEG0ADDR(fw_arg1);
+	int i;
+
+	sni_mem_init();
+
+	/* copy prom cmdline parameters to kernel cmdline */
+	for (i = 1; i < argc; i++) {
+		strcat(arcs_cmdline, (char *)CKSEG0ADDR(argv[i]));
+		if (i < (argc - 1))
+			strcat(arcs_cmdline, " ");
+	}
+}