[MIPS] IP28 support

Add support for SGI IP28 machines (Indigo 2 with R10k CPUs)
This work is mainly based on Peter Fuersts work.

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

arch/mips/Kconfig

@@ -127,6 +127,7 @@ config MACH_JAZZ
 	select ARCH_MAY_HAVE_PC_FDC
 	select CEVT_R4K
 	select CSRC_R4K
+	select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
 	select GENERIC_ISA_DMA
 	select IRQ_CPU
 	select I8253
@@ -401,13 +402,20 @@ config SGI_IP22
 	select BOOT_ELF32
 	select CEVT_R4K
 	select CSRC_R4K
+	select DEFAULT_SGI_PARTITION
 	select DMA_NONCOHERENT
 	select HW_HAS_EISA
 	select I8253
 	select I8259
 	select IP22_CPU_SCACHE
 	select IRQ_CPU
 	select GENERIC_ISA_DMA_SUPPORT_BROKEN
+	select SGI_HAS_DS1286
+	select SGI_HAS_I8042
+	select SGI_HAS_INDYDOG
+	select SGI_HAS_SEEQ
+	select SGI_HAS_WD93
+	select SGI_HAS_ZILOG
 	select SWAP_IO_SPACE
 	select SYS_HAS_CPU_R4X00
 	select SYS_HAS_CPU_R5000
@@ -425,6 +433,7 @@ config SGI_IP27
 	select ARC
 	select ARC64
 	select BOOT_ELF64
+	select DEFAULT_SGI_PARTITION
 	select DMA_IP27
 	select SYS_HAS_EARLY_PRINTK
 	select HW_HAS_PCI
@@ -441,6 +450,36 @@ config SGI_IP27
 	  workstations.  To compile a Linux kernel that runs on these, say Y
 	  here.
 
+config SGI_IP28
+	bool "SGI IP28 (Indigo2 R10k) (EXPERIMENTAL)"
+	depends on EXPERIMENTAL
+	select ARC
+	select ARC64
+	select BOOT_ELF64
+	select CEVT_R4K
+	select CSRC_R4K
+	select DEFAULT_SGI_PARTITION
+	select DMA_NONCOHERENT
+	select GENERIC_ISA_DMA_SUPPORT_BROKEN
+	select IRQ_CPU
+	select HW_HAS_EISA
+	select I8253
+	select I8259
+	select SGI_HAS_DS1286
+	select SGI_HAS_I8042
+	select SGI_HAS_INDYDOG
+	select SGI_HAS_SEEQ
+	select SGI_HAS_WD93
+	select SGI_HAS_ZILOG
+	select SWAP_IO_SPACE
+	select SYS_HAS_CPU_R10000
+	select SYS_HAS_EARLY_PRINTK
+	select SYS_SUPPORTS_64BIT_KERNEL
+	select SYS_SUPPORTS_BIG_ENDIAN
+      help
+        This is the SGI Indigo2 with R10000 processor.  To compile a Linux
+        kernel that runs on these, say Y here.
+
 config SGI_IP32
 	bool "SGI IP32 (O2)"
 	select ARC
@@ -567,6 +606,7 @@ config SNI_RM
 	select BOOT_ELF32
 	select CEVT_R4K
 	select CSRC_R4K
+	select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
 	select DMA_NONCOHERENT
 	select GENERIC_ISA_DMA
 	select HW_HAS_EISA
@@ -939,6 +979,27 @@ config EMMA2RH
 config SERIAL_RM9000
 	bool
 
+config SGI_HAS_DS1286
+	bool
+
+config SGI_HAS_INDYDOG
+	bool
+
+config SGI_HAS_SEEQ
+	bool
+
+config SGI_HAS_WD93
+	bool
+
+config SGI_HAS_ZILOG
+	bool
+
+config SGI_HAS_I8042
+	bool
+
+config DEFAULT_SGI_PARTITION
+	bool
+
 config ARC32
 	bool
 
@@ -948,7 +1009,7 @@ config BOOT_ELF32
 config MIPS_L1_CACHE_SHIFT
 	int
 	default "4" if MACH_DECSTATION
-	default "7" if SGI_IP27 || SNI_RM
+	default "7" if SGI_IP27 || SGI_IP28 || SNI_RM
 	default "4" if PMC_MSP4200_EVAL
 	default "5"
 
@@ -957,7 +1018,7 @@ config HAVE_STD_PC_SERIAL_PORT
 
 config ARC_CONSOLE
 	bool "ARC console support"
-	depends on SGI_IP22 || (SNI_RM && CPU_LITTLE_ENDIAN)
+	depends on SGI_IP22 || SGI_IP28 || (SNI_RM && CPU_LITTLE_ENDIAN)
 
 config ARC_MEMORY
 	bool
@@ -966,7 +1027,7 @@ config ARC_MEMORY
 
 config ARC_PROMLIB
 	bool
-	depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP32
+	depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP28 || SGI_IP32
 	default y
 
 config ARC64

arch/mips/Makefile

@@ -478,6 +478,20 @@ OBJCOPYFLAGS			:= --change-addresses=0x57ffffff80000000
 endif
 endif
 
+#
+# SGI IP28 (Indigo2 R10k)
+#
+# Set the load address to >= 0xa800000020080000 if you want to leave space for
+# symmon, 0xa800000020004000 for production kernels ?  Note that the value must
+# be 16kb aligned or the handling of the current variable will break.
+# Simplified: what IP22 does at 128MB+ in ksegN, IP28 does at 512MB+ in xkphys
+#
+#core-$(CONFIG_SGI_IP28)		+= arch/mips/sgi-ip22/ arch/mips/arc/arc_con.o
+core-$(CONFIG_SGI_IP28)		+= arch/mips/sgi-ip22/
+cflags-$(CONFIG_SGI_IP28)	+= -mr10k-cache-barrier=1 -Iinclude/asm-mips/mach-ip28
+#cflags-$(CONFIG_SGI_IP28)	+= -Iinclude/asm-mips/mach-ip28
+load-$(CONFIG_SGI_IP28)		+= 0xa800000020004000
+
 #
 # SGI-IP32 (O2)
 #

arch/mips/sgi-ip22/Makefile

@@ -3,9 +3,11 @@
 # under Linux.
 #
 
-obj-y	+= ip22-mc.o ip22-hpc.o ip22-int.o ip22-berr.o \
-	   ip22-time.o ip22-nvram.o ip22-platform.o ip22-reset.o ip22-setup.o
+obj-y	+= ip22-mc.o ip22-hpc.o ip22-int.o ip22-time.o ip22-nvram.o \
+	   ip22-platform.o ip22-reset.o ip22-setup.o
 
+obj-$(CONFIG_SGI_IP22) += ip22-berr.o
+obj-$(CONFIG_SGI_IP28) += ip28-berr.o
 obj-$(CONFIG_EISA)	+= ip22-eisa.o
 
-EXTRA_CFLAGS += -Werror
+# EXTRA_CFLAGS += -Werror

arch/mips/sgi-ip22/ip22-mc.c

@@ -4,6 +4,7 @@
  * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
  * Copyright (C) 1999 Andrew R. Baker (andrewb@uab.edu) - Indigo2 changes
  * Copyright (C) 2003 Ladislav Michl  (ladis@linux-mips.org)
+ * Copyright (C) 2004 Peter Fuerst    (pf@net.alphadv.de) - IP28
  */
 
 #include <linux/init.h>
@@ -137,9 +138,12 @@ void __init sgimc_init(void)
 	/* Step 2: Enable all parity checking in cpu control register
 	 *         zero.
 	 */
+	/* don't touch parity settings for IP28 */
+#ifndef CONFIG_SGI_IP28
 	tmp = sgimc->cpuctrl0;
 	tmp |= (SGIMC_CCTRL0_EPERRGIO | SGIMC_CCTRL0_EPERRMEM |
 		SGIMC_CCTRL0_R4KNOCHKPARR);
+#endif
 	sgimc->cpuctrl0 = tmp;
 
 	/* Step 3: Setup the MC write buffer depth, this is controlled