powerpc/booke: Add support for new e500mc core

The new e500mc core from Freescale is based on the e500v2 but with the
following changes:

* Supports only the Enhanced Debug Architecture (DSRR0/1, etc)
* Floating Point
* No SPE
* Supports lwsync
* Doorbell Exceptions
* Hypervisor
* Cache line size is now 64-bytes (e500v1/v2 have a 32-byte cache line)

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index e44d553..aa421f5 100644 (file)
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -1522,6 +1522,21 @@ static struct cpu_spec __initdata cpu_specs[] = {
                .machine_check          = machine_check_e500,
                .platform               = "ppc8548",
        },
+       {       /* e500mc */
+               .pvr_mask               = 0xffff0000,
+               .pvr_value              = 0x80230000,
+               .cpu_name               = "e500mc",
+               /* xxx - galak: add CPU_FTR_MAYBE_CAN_DOZE */
+               .cpu_features           = CPU_FTRS_E500MC,
+               .cpu_user_features      = COMMON_USER_BOOKE | PPC_FEATURE_HAS_FPU,
+               .icache_bsize           = 64,
+               .dcache_bsize           = 64,
+               .num_pmcs               = 4,
+               .oprofile_cpu_type      = "ppc/e500", /* xxx - galak, e500mc? */
+               .oprofile_type          = PPC_OPROFILE_FSL_EMB,
+               .machine_check          = machine_check_e500,
+               .platform               = "ppce500mc",
+       },
        {       /* default match */
                .pvr_mask               = 0x00000000,
                .pvr_value              = 0x00000000,

diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index 9501c58..505494f 100644 (file)
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -68,9 +68,13 @@
 #define MCHECK_STACK_BASE      mcheckirq_ctx
 #define CRIT_STACK_BASE                critirq_ctx
 
-/* only on e200 for now */
+/* only on e500mc/e200 */
 #define DEBUG_STACK_BASE       dbgirq_ctx
+#ifdef CONFIG_PPC_E500MC
+#define DEBUG_SPRG             SPRN_SPRG9
+#else
 #define DEBUG_SPRG             SPRN_SPRG6W
+#endif
 
 #define EXC_LVL_FRAME_OVERHEAD (THREAD_SIZE - INT_FRAME_SIZE - EXC_LVL_SIZE)
 

diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index 503f860..7c2b653 100644 (file)
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -304,7 +304,7 @@ skpinv:     addi    r6,r6,1                         /* Increment */
        SET_IVOR(13, DataTLBError);
        SET_IVOR(14, InstructionTLBError);
        SET_IVOR(15, DebugDebug);
-#if defined(CONFIG_E500)
+#if defined(CONFIG_E500) && !defined(CONFIG_PPC_E500MC)
        SET_IVOR(15, DebugCrit);
 #endif
        SET_IVOR(32, SPEUnavailable);
@@ -313,6 +313,9 @@ skpinv:     addi    r6,r6,1                         /* Increment */
 #ifndef CONFIG_E200
        SET_IVOR(35, PerformanceMonitor);
 #endif
+#ifdef CONFIG_PPC_E500MC
+       SET_IVOR(36, Doorbell);
+#endif
 
        /* Establish the interrupt vector base */
        lis     r4,interrupt_base@h     /* IVPR only uses the high 16-bits */
@@ -750,10 +753,13 @@ interrupt_base:
        /* Performance Monitor */
        EXCEPTION(0x2060, PerformanceMonitor, performance_monitor_exception, EXC_XFER_STD)
 
+#ifdef CONFIG_PPC_E500MC
+       EXCEPTION(0x2070, Doorbell, unknown_exception, EXC_XFER_EE)
+#endif
 
        /* Debug Interrupt */
        DEBUG_DEBUG_EXCEPTION
-#if defined(CONFIG_E500)
+#if defined(CONFIG_E500) && !defined(CONFIG_PPC_E500MC)
        DEBUG_CRIT_EXCEPTION
 #endif
 

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index f7efaa9..1a1ccfb 100644 (file)
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -95,6 +95,11 @@ config E500
        select FSL_EMB_PERFMON
        bool
 
+config PPC_E500MC
+       bool "e500mc Support"
+       select PPC_FPU
+       depends on E500
+
 config PPC_FPU
        bool
        default y if PPC64
@@ -157,7 +162,7 @@ config ALTIVEC
 
 config SPE
        bool "SPE Support"
-       depends on E200 || E500
+       depends on E200 || (E500 && !PPC_E500MC)
        default y
        ---help---
          This option enables kernel support for the Signal Processing

diff --git a/include/asm-powerpc/cache.h b/include/asm-powerpc/cache.h
index 5350704..81de6eb 100644 (file)
--- a/include/asm-powerpc/cache.h
+++ b/include/asm-powerpc/cache.h
@@ -8,6 +8,9 @@
 #if defined(CONFIG_8xx) || defined(CONFIG_403GCX)
 #define L1_CACHE_SHIFT         4
 #define MAX_COPY_PREFETCH      1
+#elif defined(CONFIG_PPC_E500MC)
+#define L1_CACHE_SHIFT         6
+#define MAX_COPY_PREFETCH      4
 #elif defined(CONFIG_PPC32)
 #define L1_CACHE_SHIFT         5
 #define MAX_COPY_PREFETCH      4

diff --git a/include/asm-powerpc/cputable.h b/include/asm-powerpc/cputable.h
index 1e79673..a3dce17 100644 (file)
--- a/include/asm-powerpc/cputable.h
+++ b/include/asm-powerpc/cputable.h
@@ -351,6 +351,8 @@ extern void do_feature_fixups(unsigned long value, void *fixup_start,
            CPU_FTR_NODSISRALIGN)
 #define CPU_FTRS_E500_2        (CPU_FTR_USE_TB | CPU_FTR_SPE_COMP | \
            CPU_FTR_BIG_PHYS | CPU_FTR_NODSISRALIGN)
+#define CPU_FTRS_E500MC        (CPU_FTR_USE_TB | CPU_FTR_BIG_PHYS | \
+           CPU_FTR_NODSISRALIGN)
 #define CPU_FTRS_GENERIC_32    (CPU_FTR_COMMON | CPU_FTR_NODSISRALIGN)
 
 /* 64-bit CPUs */
@@ -421,7 +423,7 @@ enum {
            CPU_FTRS_E200 |
 #endif
 #ifdef CONFIG_E500
-           CPU_FTRS_E500 | CPU_FTRS_E500_2 |
+           CPU_FTRS_E500 | CPU_FTRS_E500_2 | CPU_FTRS_E500MC |
 #endif
            0,
 };
@@ -461,7 +463,7 @@ enum {
            CPU_FTRS_E200 &
 #endif
 #ifdef CONFIG_E500
-           CPU_FTRS_E500 & CPU_FTRS_E500_2 &
+           CPU_FTRS_E500 & CPU_FTRS_E500_2 & CPU_FTRS_E500MC &
 #endif
            CPU_FTRS_POSSIBLE,
 };

diff --git a/include/asm-powerpc/synch.h b/include/asm-powerpc/synch.h
index 2cda3c3..42a1ef5 100644 (file)
--- a/include/asm-powerpc/synch.h
+++ b/include/asm-powerpc/synch.h
@@ -4,7 +4,7 @@
 
 #include <linux/stringify.h>
 
-#ifdef __powerpc64__
+#if defined(__powerpc64__) || defined(CONFIG_PPC_E500MC)
 #define __SUBARCH_HAS_LWSYNC
 #endif