Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9267a30d1dc7dcd7cadb5eb6a5bbfed703feeefa
Commit: 9267a30d1dc7dcd7cadb5eb6a5bbfed703feeefa
Parent: 35832e26f95ba14a6b6f0519441c5cb64cca6bf9
Author: Marc St-Jean <[EMAIL PROTECTED]>
AuthorDate: Thu Jun 14 15:55:31 2007 -0600
Committer: Ralf Baechle <[EMAIL PROTECTED]>
CommitDate: Tue Jul 10 17:33:03 2007 +0100
[MIPS] PMC MSP71xx mips common
Patch to add mips common support for the PMC-Sierra MSP71xx devices.
Signed-off-by: Marc St-Jean <[EMAIL PROTECTED]>
Signed-off-by: Ralf Baechle <[EMAIL PROTECTED]>
---
arch/mips/Kconfig | 35 +++++++++++++++++++++++++++++++
arch/mips/Makefile | 11 +++++++++-
arch/mips/kernel/cpu-probe.c | 20 ++++++++++++++++++
arch/mips/kernel/head.S | 5 +++-
arch/mips/kernel/traps.c | 6 +++++
arch/mips/pmc-sierra/Kconfig | 46 ++++++++++++++++++++++++++++++++++++++++++
include/asm-mips/bootinfo.h | 12 +++++++++++
include/asm-mips/cpu.h | 2 +
include/asm-mips/mipsregs.h | 33 ++++++++++++++++++++++++++++++
include/asm-mips/war.h | 11 ++++++++++
10 files changed, 179 insertions(+), 2 deletions(-)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 3994f61..2076d47 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -250,6 +250,7 @@ config MIPS_SIM
select DMA_NONCOHERENT
select SYS_HAS_EARLY_PRINTK
select IRQ_CPU
+ select BOOT_RAW
select SYS_HAS_CPU_MIPS32_R1
select SYS_HAS_CPU_MIPS32_R2
select SYS_HAS_EARLY_PRINTK
@@ -333,6 +334,27 @@ config MACH_VR41XX
select SYS_HAS_CPU_VR41XX
select GENERIC_HARDIRQS_NO__DO_IRQ
+config PMC_MSP
+ bool "PMC-Sierra MSP chipsets"
+ depends on EXPERIMENTAL
+ select DMA_NONCOHERENT
+ select SWAP_IO_SPACE
+ select NO_EXCEPT_FILL
+ select BOOT_RAW
+ select SYS_HAS_CPU_MIPS32_R1
+ select SYS_HAS_CPU_MIPS32_R2
+ select SYS_SUPPORTS_32BIT_KERNEL
+ select SYS_SUPPORTS_BIG_ENDIAN
+ select SYS_SUPPORTS_KGDB
+ select IRQ_CPU
+ select SERIAL_8250
+ select SERIAL_8250_CONSOLE
+ help
+ This adds support for the PMC-Sierra family of Multi-Service
+ Processor System-On-A-Chips. These parts include a number
+ of integrated peripherals, interfaces and DSPs in addition to
+ a variety of MIPS cores.
+
config PMC_YOSEMITE
bool "PMC-Sierra Yosemite eval board"
select DMA_COHERENT
@@ -706,6 +728,9 @@ config ARC
config ARCH_MAY_HAVE_PC_FDC
bool
+config BOOT_RAW
+ bool
+
config DMA_COHERENT
bool
@@ -812,6 +837,12 @@ config IRQ_CPU_RM7K
config IRQ_CPU_RM9K
bool
+config IRQ_MSP_SLP
+ bool
+
+config IRQ_MSP_CIC
+ bool
+
config IRQ_MV64340
bool
@@ -825,6 +856,9 @@ config MIPS_BOARDS_GEN
config PCI_GT64XXX_PCI0
bool
+config NO_EXCEPT_FILL
+ bool
+
config MIPS_TX3927
bool
select HAS_TXX9_SERIAL
@@ -886,6 +920,7 @@ config MIPS_L1_CACHE_SHIFT
int
default "4" if MACH_DECSTATION || SNI_RM
default "7" if SGI_IP27
+ default "4" if PMC_MSP4200_EVAL
default "5"
config HAVE_STD_PC_SERIAL_PORT
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 6642ee5..2b9af2f 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -343,6 +343,14 @@ cflags-$(CONFIG_MOMENCO_OCELOT) +=
-Iinclude/asm-mips/mach-ocelot
load-$(CONFIG_MOMENCO_OCELOT) += 0xffffffff80100000
#
+# PMC-Sierra MSP SOCs
+#
+core-$(CONFIG_PMC_MSP) += arch/mips/pmc-sierra/msp71xx/
+cflags-$(CONFIG_PMC_MSP) += -Iinclude/asm-mips/pmc-sierra/msp71xx \
+ -mno-branch-likely
+load-$(CONFIG_PMC_MSP) += 0xffffffff80100000
+
+#
# PMC-Sierra Yosemite
#
core-$(CONFIG_PMC_YOSEMITE) += arch/mips/pmc-sierra/yosemite/
@@ -595,7 +603,8 @@ JIFFIES = jiffies_64
endif
AFLAGS += $(cflags-y)
-CFLAGS += $(cflags-y)
+CFLAGS += $(cflags-y) \
+ -D"VMLINUX_LOAD_ADDRESS=$(load-y)"
LDFLAGS += -m $(ld-emul)
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 23d8a3b..c6b8b07 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -186,9 +186,29 @@ static inline void check_wait(void)
}
}
+static inline void check_errata(void)
+{
+ struct cpuinfo_mips *c = ¤t_cpu_data;
+
+ switch (c->cputype) {
+ case CPU_34K:
+ /*
+ * Erratum "RPS May Cause Incorrect Instruction Execution"
+ * This code only handles VPE0, any SMP/SMTC/RTOS code
+ * making use of VPE1 will be responsable for that VPE.
+ */
+ if ((c->processor_id & PRID_REV_MASK) <= PRID_REV_34K_V1_0_2)
+ write_c0_config7(read_c0_config7() | MIPS_CONF7_RPS);
+ break;
+ default:
+ break;
+ }
+}
+
void __init check_bugs32(void)
{
check_wait();
+ check_errata();
}
/*
diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S
index 1f096aa..f78538e 100644
--- a/arch/mips/kernel/head.S
+++ b/arch/mips/kernel/head.S
@@ -16,6 +16,7 @@
#include <linux/init.h>
#include <linux/threads.h>
+#include <asm/addrspace.h>
#include <asm/asm.h>
#include <asm/asmmacro.h>
#include <asm/irqflags.h>
@@ -129,16 +130,18 @@
#endif
.endm
+#ifndef CONFIG_NO_EXCEPT_FILL
/*
* Reserved space for exception handlers.
* Necessary for machines which link their kernels at KSEG0.
*/
.fill 0x400
+#endif
EXPORT(stext) # used for profiling
EXPORT(_stext)
-#ifndef CONFIG_MIPS_SIM
+#ifdef CONFIG_BOOT_RAW
/*
* Give us a fighting chance of running if execution beings at the
* kernel load address. This is needed because this platform does
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 9b19a84..80ea4fa 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -69,6 +69,7 @@ extern asmlinkage void handle_reserved(void);
extern int fpu_emulator_cop1Handler(struct pt_regs *xcp,
struct mips_fpu_struct *ctx, int has_fpu);
+void (*board_watchpoint_handler)(struct pt_regs *regs);
void (*board_be_init)(void);
int (*board_be_handler)(struct pt_regs *regs, int is_fixup);
void (*board_nmi_handler_setup)(void);
@@ -833,6 +834,11 @@ asmlinkage void do_mdmx(struct pt_regs *regs)
asmlinkage void do_watch(struct pt_regs *regs)
{
+ if (board_watchpoint_handler) {
+ (*board_watchpoint_handler)(regs);
+ return;
+ }
+
/*
* We use the watch exception where available to detect stack
* overflows.
diff --git a/arch/mips/pmc-sierra/Kconfig b/arch/mips/pmc-sierra/Kconfig
index 24d514c..abbd0bb 100644
--- a/arch/mips/pmc-sierra/Kconfig
+++ b/arch/mips/pmc-sierra/Kconfig
@@ -1,3 +1,49 @@
+choice
+ prompt "PMC-Sierra MSP SOC type"
+ depends on PMC_MSP
+
+config PMC_MSP4200_EVAL
+ bool "PMC-Sierra MSP4200 Eval Board"
+ select IRQ_MSP_SLP
+ select HW_HAS_PCI
+
+config PMC_MSP4200_GW
+ bool "PMC-Sierra MSP4200 VoIP Gateway"
+ select IRQ_MSP_SLP
+ select HW_HAS_PCI
+
+config PMC_MSP7120_EVAL
+ bool "PMC-Sierra MSP7120 Eval Board"
+ select SYS_SUPPORTS_MULTITHREADING
+ select IRQ_MSP_CIC
+ select HW_HAS_PCI
+
+config PMC_MSP7120_GW
+ bool "PMC-Sierra MSP7120 Residential Gateway"
+ select SYS_SUPPORTS_MULTITHREADING
+ select IRQ_MSP_CIC
+ select HW_HAS_PCI
+
+config PMC_MSP7120_FPGA
+ bool "PMC-Sierra MSP7120 FPGA"
+ select SYS_SUPPORTS_MULTITHREADING
+ select IRQ_MSP_CIC
+ select HW_HAS_PCI
+
+endchoice
+
+menu "Options for PMC-Sierra MSP chipsets"
+ depends on PMC_MSP
+
+config PMC_MSP_EMBEDDED_ROOTFS
+ bool "Root filesystem embedded in kernel image"
+ select MTD
+ select MTD_BLOCK
+ select MTD_PMC_MSP_RAMROOT
+ select MTD_RAM
+
+endmenu
+
config HYPERTRANSPORT
bool "Hypertransport Support for PMC-Sierra Yosemite"
depends on PMC_YOSEMITE
diff --git a/include/asm-mips/bootinfo.h b/include/asm-mips/bootinfo.h
index 12f9d71..94fc9be 100644
--- a/include/asm-mips/bootinfo.h
+++ b/include/asm-mips/bootinfo.h
@@ -213,6 +213,18 @@
#define MACH_GROUP_LEMOTE 27
#define MACH_LEMOTE_FULONG 0
+/*
+ * Valid machtype for group PMC-MSP
+ */
+#define MACH_GROUP_MSP 26 /* PMC-Sierra MSP boards/CPUs */
+#define MACH_MSP4200_EVAL 0 /* PMC-Sierra MSP4200 Evaluation */
+#define MACH_MSP4200_GW 1 /* PMC-Sierra MSP4200 Gateway demo */
+#define MACH_MSP4200_FPGA 2 /* PMC-Sierra MSP4200 Emulation */
+#define MACH_MSP7120_EVAL 3 /* PMC-Sierra MSP7120 Evaluation */
+#define MACH_MSP7120_GW 4 /* PMC-Sierra MSP7120 Residential GW */
+#define MACH_MSP7120_FPGA 5 /* PMC-Sierra MSP7120 Emulation */
+#define MACH_MSP_OTHER 255 /* PMC-Sierra unknown board type */
+
#define CL_SIZE COMMAND_LINE_SIZE
const char *get_system_type(void);
diff --git a/include/asm-mips/cpu.h b/include/asm-mips/cpu.h
index a362395..3857358 100644
--- a/include/asm-mips/cpu.h
+++ b/include/asm-mips/cpu.h
@@ -109,6 +109,7 @@
* Definitions for 7:0 on legacy processors
*/
+#define PRID_REV_MASK 0x00ff
#define PRID_REV_TX4927 0x0022
#define PRID_REV_TX4937 0x0030
@@ -125,6 +126,7 @@
#define PRID_REV_VR4122 0x0070
#define PRID_REV_VR4181A 0x0070 /* Same as VR4122 */
#define PRID_REV_VR4130 0x0080
+#define PRID_REV_34K_V1_0_2 0x0022
/*
* Older processors used to encode processor version and revision in two
diff --git a/include/asm-mips/mipsregs.h b/include/asm-mips/mipsregs.h
index 668db02..706b369 100644
--- a/include/asm-mips/mipsregs.h
+++ b/include/asm-mips/mipsregs.h
@@ -15,6 +15,7 @@
#include <linux/linkage.h>
#include <asm/hazards.h>
+#include <asm/war.h>
/*
* The following macros are especially useful for __asm__
@@ -537,6 +538,9 @@
#define MIPS_CONF7_WII (_ULCAST_(1) << 31)
+#define MIPS_CONF7_RPS (_ULCAST_(1) << 2)
+
+
/*
* Bits in the MIPS32/64 coprocessor 1 (FPU) revision register.
*/
@@ -1298,10 +1302,39 @@ static inline void tlb_probe(void)
static inline void tlb_read(void)
{
+#if MIPS34K_MISSED_ITLB_WAR
+ int res = 0;
+
+ __asm__ __volatile__(
+ " .set push \n"
+ " .set noreorder \n"
+ " .set noat \n"
+ " .set mips32r2 \n"
+ " .word 0x41610001 # dvpe $1 \n"
+ " move %0, $1 \n"
+ " ehb \n"
+ " .set pop \n"
+ : "=r" (res));
+
+ instruction_hazard();
+#endif
+
__asm__ __volatile__(
".set noreorder\n\t"
"tlbr\n\t"
".set reorder");
+
+#if MIPS34K_MISSED_ITLB_WAR
+ if ((res & _ULCAST_(1)))
+ __asm__ __volatile__(
+ " .set push \n"
+ " .set noreorder \n"
+ " .set noat \n"
+ " .set mips32r2 \n"
+ " .word 0x41600021 # evpe \n"
+ " ehb \n"
+ " .set pop \n");
+#endif
}
static inline void tlb_write_indexed(void)
diff --git a/include/asm-mips/war.h b/include/asm-mips/war.h
index c507f1b..45cb827 100644
--- a/include/asm-mips/war.h
+++ b/include/asm-mips/war.h
@@ -198,6 +198,14 @@
#endif
/*
+ * 34K core erratum: "Problems Executing the TLBR Instruction"
+ */
+#if defined(CONFIG_PMC_MSP7120_EVAL) || defined(CONFIG_PMC_MSP7120_GW) || \
+ defined(CONFIG_PMC_MSP7120_FPGA)
+#define MIPS34K_MISSED_ITLB_WAR 1
+#endif
+
+/*
* Workarounds default to off
*/
#ifndef ICACHE_REFILLS_WORKAROUND_WAR
@@ -236,5 +244,8 @@
#ifndef R10000_LLSC_WAR
#define R10000_LLSC_WAR 0
#endif
+#ifndef MIPS34K_MISSED_ITLB_WAR
+#define MIPS34K_MISSED_ITLB_WAR 0
+#endif
#endif /* _ASM_WAR_H */
-
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