Patchwork [12/27] Add POWER7 support for ppc

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Submitter David Gibson
Date March 23, 2011, 5:30 a.m.
Message ID <1300858247-8197-13-git-send-email-david@gibson.dropbear.id.au>
Download mbox | patch
Permalink /patch/88024/
State New
Headers show

Comments

David Gibson - March 23, 2011, 5:30 a.m.
This adds emulation support for the recent POWER7 cpu to qemu.  It's far
from perfect - it's missing a number of POWER7 features so far, including
any support for VSX or decimal floating point instructions.  However, it's
close enough to boot a kernel with the POWER7 PVR.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
---
 hw/ppc.c                    |   35 +++++++++++++++
 hw/ppc.h                    |    1 +
 target-ppc/cpu.h            |   16 +++++++
 target-ppc/helper.c         |    6 +++
 target-ppc/translate_init.c |  103 +++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 161 insertions(+), 0 deletions(-)

Patch

diff --git a/hw/ppc.c b/hw/ppc.c
index b55a848..dabb816 100644
--- a/hw/ppc.c
+++ b/hw/ppc.c
@@ -247,6 +247,41 @@  void ppc970_irq_init (CPUState *env)
     env->irq_inputs = (void **)qemu_allocate_irqs(&ppc970_set_irq, env,
                                                   PPC970_INPUT_NB);
 }
+
+/* POWER7 internal IRQ controller */
+static void power7_set_irq (void *opaque, int pin, int level)
+{
+    CPUState *env = opaque;
+    int cur_level;
+
+    LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
+                env, pin, level);
+    cur_level = (env->irq_input_state >> pin) & 1;
+
+    switch (pin) {
+    case POWER7_INPUT_INT:
+        /* Level sensitive - active high */
+        LOG_IRQ("%s: set the external IRQ state to %d\n",
+                __func__, level);
+        ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
+        break;
+    default:
+        /* Unknown pin - do nothing */
+        LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
+        return;
+    }
+    if (level) {
+        env->irq_input_state |= 1 << pin;
+    } else {
+        env->irq_input_state &= ~(1 << pin);
+    }
+}
+
+void ppcPOWER7_irq_init (CPUState *env)
+{
+    env->irq_inputs = (void **)qemu_allocate_irqs(&power7_set_irq, env,
+                                                  POWER7_INPUT_NB);
+}
 #endif /* defined(TARGET_PPC64) */
 
 /* PowerPC 40x internal IRQ controller */
diff --git a/hw/ppc.h b/hw/ppc.h
index 34f54cf..3ccf134 100644
--- a/hw/ppc.h
+++ b/hw/ppc.h
@@ -36,6 +36,7 @@  void ppc40x_irq_init (CPUState *env);
 void ppce500_irq_init (CPUState *env);
 void ppc6xx_irq_init (CPUState *env);
 void ppc970_irq_init (CPUState *env);
+void ppcPOWER7_irq_init (CPUState *env);
 
 /* PPC machines for OpenBIOS */
 enum {
diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 10341b3..25d0658 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -119,6 +119,8 @@  enum powerpc_mmu_t {
     POWERPC_MMU_64B        = POWERPC_MMU_64 | 0x00000001,
     /* 620 variant (no segment exceptions)                     */
     POWERPC_MMU_620        = POWERPC_MMU_64 | 0x00000002,
+    /* Architecture 2.06 variant                               */
+    POWERPC_MMU_2_06       = POWERPC_MMU_64 | POWERPC_MMU_1TSEG | 0x00000003,
 #endif /* defined(TARGET_PPC64) */
 };
 
@@ -154,6 +156,8 @@  enum powerpc_excp_t {
 #if defined(TARGET_PPC64)
     /* PowerPC 970 exception model      */
     POWERPC_EXCP_970,
+    /* POWER7 exception model           */
+    POWERPC_EXCP_POWER7,
 #endif /* defined(TARGET_PPC64) */
 };
 
@@ -289,6 +293,8 @@  enum powerpc_input_t {
     PPC_FLAGS_INPUT_405,
     /* PowerPC 970 bus                  */
     PPC_FLAGS_INPUT_970,
+    /* PowerPC POWER7 bus               */
+    PPC_FLAGS_INPUT_POWER7,
     /* PowerPC 401 bus                  */
     PPC_FLAGS_INPUT_401,
     /* Freescale RCPU bus               */
@@ -1001,6 +1007,7 @@  static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
 #define SPR_HSPRG1            (0x131)
 #define SPR_HDSISR            (0x132)
 #define SPR_HDAR              (0x133)
+#define SPR_SPURR             (0x134)
 #define SPR_BOOKE_DBCR0       (0x134)
 #define SPR_IBCR              (0x135)
 #define SPR_PURR              (0x135)
@@ -1625,6 +1632,15 @@  enum {
     PPC970_INPUT_THINT      = 6,
     PPC970_INPUT_NB,
 };
+
+enum {
+    /* POWER7 input pins */
+    POWER7_INPUT_INT        = 0,
+    /* POWER7 probably has other inputs, but we don't care about them
+     * for any existing machine.  We can wire these up when we need
+     * them */
+    POWER7_INPUT_NB,
+};
 #endif
 
 /* Hardware exceptions definitions */
diff --git a/target-ppc/helper.c b/target-ppc/helper.c
index 6712fce..278bee4 100644
--- a/target-ppc/helper.c
+++ b/target-ppc/helper.c
@@ -1200,6 +1200,7 @@  static inline int check_physical(CPUState *env, mmu_ctx_t *ctx,
 #if defined(TARGET_PPC64)
     case POWERPC_MMU_620:
     case POWERPC_MMU_64B:
+    case POWERPC_MMU_2_06:
         /* Real address are 60 bits long */
         ctx->raddr &= 0x0FFFFFFFFFFFFFFFULL;
         ctx->prot |= PAGE_WRITE;
@@ -1277,6 +1278,7 @@  int get_physical_address (CPUState *env, mmu_ctx_t *ctx, target_ulong eaddr,
 #if defined(TARGET_PPC64)
         case POWERPC_MMU_620:
         case POWERPC_MMU_64B:
+        case POWERPC_MMU_2_06:
 #endif
             if (ret < 0) {
                 /* We didn't match any BAT entry or don't have BATs */
@@ -1376,6 +1378,7 @@  int cpu_ppc_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
 #if defined(TARGET_PPC64)
                 case POWERPC_MMU_620:
                 case POWERPC_MMU_64B:
+                case POWERPC_MMU_2_06:
 #endif
                     env->exception_index = POWERPC_EXCP_ISI;
                     env->error_code = 0x40000000;
@@ -1485,6 +1488,7 @@  int cpu_ppc_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
 #if defined(TARGET_PPC64)
                 case POWERPC_MMU_620:
                 case POWERPC_MMU_64B:
+                case POWERPC_MMU_2_06:
 #endif
                     env->exception_index = POWERPC_EXCP_DSI;
                     env->error_code = 0;
@@ -1808,6 +1812,7 @@  void ppc_tlb_invalidate_all (CPUPPCState *env)
 #if defined(TARGET_PPC64)
     case POWERPC_MMU_620:
     case POWERPC_MMU_64B:
+    case POWERPC_MMU_2_06:
 #endif /* defined(TARGET_PPC64) */
         tlb_flush(env, 1);
         break;
@@ -1875,6 +1880,7 @@  void ppc_tlb_invalidate_one (CPUPPCState *env, target_ulong addr)
 #if defined(TARGET_PPC64)
     case POWERPC_MMU_620:
     case POWERPC_MMU_64B:
+    case POWERPC_MMU_2_06:
         /* tlbie invalidate TLBs for all segments */
         /* XXX: given the fact that there are too many segments to invalidate,
          *      and we still don't have a tlb_flush_mask(env, n, mask) in Qemu,
diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index 695936b..e6c1907 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -61,6 +61,7 @@  void glue(glue(ppc, name),_irq_init) (CPUPPCState *env);
 PPC_IRQ_INIT_FN(40x);
 PPC_IRQ_INIT_FN(6xx);
 PPC_IRQ_INIT_FN(970);
+PPC_IRQ_INIT_FN(POWER7);
 PPC_IRQ_INIT_FN(e500);
 
 /* Generic callbacks:
@@ -3129,6 +3130,35 @@  static void init_excp_970 (CPUPPCState *env)
     env->hreset_vector = 0x0000000000000100ULL;
 #endif
 }
+
+static void init_excp_POWER7 (CPUPPCState *env)
+{
+#if !defined(CONFIG_USER_ONLY)
+    env->excp_vectors[POWERPC_EXCP_RESET]    = 0x00000100;
+    env->excp_vectors[POWERPC_EXCP_MCHECK]   = 0x00000200;
+    env->excp_vectors[POWERPC_EXCP_DSI]      = 0x00000300;
+    env->excp_vectors[POWERPC_EXCP_DSEG]     = 0x00000380;
+    env->excp_vectors[POWERPC_EXCP_ISI]      = 0x00000400;
+    env->excp_vectors[POWERPC_EXCP_ISEG]     = 0x00000480;
+    env->excp_vectors[POWERPC_EXCP_EXTERNAL] = 0x00000500;
+    env->excp_vectors[POWERPC_EXCP_ALIGN]    = 0x00000600;
+    env->excp_vectors[POWERPC_EXCP_PROGRAM]  = 0x00000700;
+    env->excp_vectors[POWERPC_EXCP_FPU]      = 0x00000800;
+    env->excp_vectors[POWERPC_EXCP_DECR]     = 0x00000900;
+    env->excp_vectors[POWERPC_EXCP_HDECR]    = 0x00000980;
+    env->excp_vectors[POWERPC_EXCP_SYSCALL]  = 0x00000C00;
+    env->excp_vectors[POWERPC_EXCP_TRACE]    = 0x00000D00;
+    env->excp_vectors[POWERPC_EXCP_PERFM]    = 0x00000F00;
+    env->excp_vectors[POWERPC_EXCP_VPU]      = 0x00000F20;
+    env->excp_vectors[POWERPC_EXCP_IABR]     = 0x00001300;
+    env->excp_vectors[POWERPC_EXCP_MAINT]    = 0x00001600;
+    env->excp_vectors[POWERPC_EXCP_VPUA]     = 0x00001700;
+    env->excp_vectors[POWERPC_EXCP_THERM]    = 0x00001800;
+    env->hreset_excp_prefix = 0;
+    /* Hardware reset vector */
+    env->hreset_vector = 0x0000000000000100ULL;
+#endif
+}
 #endif
 
 /*****************************************************************************/
@@ -6310,6 +6340,74 @@  static void init_proc_970MP (CPUPPCState *env)
     vscr_init(env, 0x00010000);
 }
 
+/* POWER7 */
+#define POWERPC_INSNS_POWER7  (PPC_INSNS_BASE | PPC_STRING | PPC_MFTB |        \
+                              PPC_FLOAT | PPC_FLOAT_FSEL | PPC_FLOAT_FRES |   \
+                              PPC_FLOAT_FSQRT | PPC_FLOAT_FRSQRTE |           \
+                              PPC_FLOAT_STFIWX |                              \
+                              PPC_CACHE | PPC_CACHE_ICBI | PPC_CACHE_DCBZT |  \
+                              PPC_MEM_SYNC | PPC_MEM_EIEIO |                  \
+                              PPC_MEM_TLBIE | PPC_MEM_TLBSYNC |               \
+                              PPC_64B | PPC_ALTIVEC |                         \
+                              PPC_SEGMENT_64B | PPC_SLBI |                    \
+                              PPC_POPCNTB | PPC_POPCNTWD)
+#define POWERPC_MSRM_POWER7   (0x800000000204FF36ULL)
+#define POWERPC_MMU_POWER7    (POWERPC_MMU_2_06)
+#define POWERPC_EXCP_POWER7   (POWERPC_EXCP_POWER7)
+#define POWERPC_INPUT_POWER7  (PPC_FLAGS_INPUT_POWER7)
+#define POWERPC_BFDM_POWER7   (bfd_mach_ppc64)
+#define POWERPC_FLAG_POWER7   (POWERPC_FLAG_VRE | POWERPC_FLAG_SE |            \
+                              POWERPC_FLAG_BE | POWERPC_FLAG_PMM |            \
+                              POWERPC_FLAG_BUS_CLK)
+#define check_pow_POWER7    check_pow_nocheck
+
+static void init_proc_POWER7 (CPUPPCState *env)
+{
+    gen_spr_ne_601(env);
+    gen_spr_7xx(env);
+    /* Time base */
+    gen_tbl(env);
+    /* PURR & SPURR: Hack - treat these as aliases for the TB for now */
+    spr_register(env, SPR_PURR,   "PURR",
+                 &spr_read_purr, SPR_NOACCESS,
+                 &spr_read_purr, SPR_NOACCESS,
+                 0x00000000);
+    spr_register(env, SPR_SPURR,   "SPURR",
+                 &spr_read_purr, SPR_NOACCESS,
+                 &spr_read_purr, SPR_NOACCESS,
+                 0x00000000);
+    /* Memory management */
+    /* XXX : not implemented */
+    spr_register(env, SPR_MMUCFG, "MMUCFG",
+                 SPR_NOACCESS, SPR_NOACCESS,
+                 &spr_read_generic, SPR_NOACCESS,
+                 0x00000000); /* TOFIX */
+    /* XXX : not implemented */
+    spr_register(env, SPR_CTRL, "SPR_CTRLT",
+                 SPR_NOACCESS, SPR_NOACCESS,
+                 &spr_read_generic, &spr_write_generic,
+                 0x80800000);
+    spr_register(env, SPR_UCTRL, "SPR_CTRLF",
+                 SPR_NOACCESS, SPR_NOACCESS,
+                 &spr_read_generic, &spr_write_generic,
+                 0x80800000);
+    spr_register(env, SPR_VRSAVE, "SPR_VRSAVE",
+                 &spr_read_generic, &spr_write_generic,
+                 &spr_read_generic, &spr_write_generic,
+                 0x00000000);
+#if !defined(CONFIG_USER_ONLY)
+    env->slb_nr = 32;
+#endif
+    init_excp_POWER7(env);
+    env->dcache_line_size = 128;
+    env->icache_line_size = 128;
+    /* Allocate hardware IRQ controller */
+    ppcPOWER7_irq_init(env);
+    /* Can't find information on what this should be on reset.  This
+     * value is the one used by 74xx processors. */
+    vscr_init(env, 0x00010000);
+}
+
 /* PowerPC 620                                                               */
 #define POWERPC_INSNS_620    (PPC_INSNS_BASE | PPC_STRING | PPC_MFTB |        \
                               PPC_FLOAT | PPC_FLOAT_FSEL | PPC_FLOAT_FRES |   \
@@ -7032,6 +7130,8 @@  enum {
     CPU_POWERPC_POWER6             = 0x003E0000,
     CPU_POWERPC_POWER6_5           = 0x0F000001, /* POWER6 in POWER5 mode */
     CPU_POWERPC_POWER6A            = 0x0F000002,
+#define CPU_POWERPC_POWER7           CPU_POWERPC_POWER7_v20
+    CPU_POWERPC_POWER7_v20         = 0x003F0200,
     CPU_POWERPC_970                = 0x00390202,
 #define CPU_POWERPC_970FX            CPU_POWERPC_970FX_v31
     CPU_POWERPC_970FX_v10          = 0x00391100,
@@ -8834,6 +8934,9 @@  static const ppc_def_t ppc_defs[] = {
     /* POWER6A                                                               */
     POWERPC_DEF("POWER6A",       CPU_POWERPC_POWER6A,                POWER6),
 #endif
+    /* POWER7                                                                */
+    POWERPC_DEF("POWER7",        CPU_POWERPC_POWER7,                 POWER7),
+    POWERPC_DEF("POWER7_v2.0",   CPU_POWERPC_POWER7_v20,             POWER7),
     /* PowerPC 970                                                           */
     POWERPC_DEF("970",           CPU_POWERPC_970,                    970),
     /* PowerPC 970FX (G5)                                                    */