Patchwork [v2] SPARC: Fix Leon3 cache control

The "leon3_cache_control_int" (op_helper.c) function is called within leon3.c
which leads to segfault error with the global "env".

Now cache control is a CPU feature and everything is handled in op_helper.c.

Signed-off-by: Fabien Chouteau <chouteau@adacore.com>
---
 hw/leon3.c               |    5 ++---
 target-sparc/cpu.h       |    8 ++++++--
 target-sparc/helper.c    |    2 +-
 target-sparc/op_helper.c |   18 ++++++++++++++----
 4 files changed, 23 insertions(+), 10 deletions(-)

Thanks, applied.

On Mon, Jan 31, 2011 at 10:36 AM, Fabien Chouteau <chouteau@adacore.com> wrote:
> The "leon3_cache_control_int" (op_helper.c) function is called within leon3.c
> which leads to segfault error with the global "env".
>
> Now cache control is a CPU feature and everything is handled in op_helper.c.
>
> Signed-off-by: Fabien Chouteau <chouteau@adacore.com>
> ---
>  hw/leon3.c               |    5 ++---
>  target-sparc/cpu.h       |    8 ++++++--
>  target-sparc/helper.c    |    2 +-
>  target-sparc/op_helper.c |   18 ++++++++++++++----
>  4 files changed, 23 insertions(+), 10 deletions(-)
>
> diff --git a/hw/leon3.c b/hw/leon3.c
> index 69d8f3b..919f49f 100644
> --- a/hw/leon3.c
> +++ b/hw/leon3.c
> @@ -56,10 +56,9 @@ static void main_cpu_reset(void *opaque)
>     env->npc    = s->entry + 4;
>  }
>
> -static void leon3_irq_ack(void *irq_manager, int intno)
> +void leon3_irq_ack(void *irq_manager, int intno)
>  {
>     grlib_irqmp_ack((DeviceState *)irq_manager, intno);
> -    leon3_cache_control_int();
>  }
>
>  static void leon3_set_pil_in(void *opaque, uint32_t pil_in)
> @@ -130,7 +129,7 @@ static void leon3_generic_hw_init(ram_addr_t  ram_size,
>     /* Allocate IRQ manager */
>     grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in);
>
> -    env->qemu_irq_ack = leon3_irq_ack;
> +    env->qemu_irq_ack = leon3_irq_manager;
>
>     /* Allocate RAM */
>     if ((uint64_t)ram_size > (1UL << 30)) {
> diff --git a/target-sparc/cpu.h b/target-sparc/cpu.h
> index 6f5990b..320530e 100644
> --- a/target-sparc/cpu.h
> +++ b/target-sparc/cpu.h
> @@ -268,6 +268,8 @@ typedef struct sparc_def_t {
>  #define CPU_FEATURE_GL           (1 << 13)
>  #define CPU_FEATURE_TA0_SHUTDOWN (1 << 14) /* Shutdown on "ta 0x0" */
>  #define CPU_FEATURE_ASR17        (1 << 15)
> +#define CPU_FEATURE_CACHE_CTRL   (1 << 16)
> +
>  #ifndef TARGET_SPARC64
>  #define CPU_DEFAULT_FEATURES (CPU_FEATURE_FLOAT | CPU_FEATURE_SWAP |  \
>                               CPU_FEATURE_MUL | CPU_FEATURE_DIV |     \
> @@ -476,12 +478,14 @@ void cpu_put_cwp64(CPUState *env1, int cwp);
>  int cpu_cwp_inc(CPUState *env1, int cwp);
>  int cpu_cwp_dec(CPUState *env1, int cwp);
>  void cpu_set_cwp(CPUState *env1, int new_cwp);
> -
> -void leon3_cache_control_int(void);
> +void leon3_irq_manager(void *irq_manager, int intno);
>
>  /* sun4m.c, sun4u.c */
>  void cpu_check_irqs(CPUSPARCState *env);
>
> +/* leon3.c */
> +void leon3_irq_ack(void *irq_manager, int intno);
> +
>  #if defined (TARGET_SPARC64)
>
>  static inline int compare_masked(uint64_t x, uint64_t y, uint64_t mask)
> diff --git a/target-sparc/helper.c b/target-sparc/helper.c
> index 2f3d1e6..b2d4d70 100644
> --- a/target-sparc/helper.c
> +++ b/target-sparc/helper.c
> @@ -1289,7 +1289,7 @@ static const sparc_def_t sparc_defs[] = {
>         .mmu_trcr_mask = 0xffffffff,
>         .nwindows = 8,
>         .features = CPU_DEFAULT_FEATURES | CPU_FEATURE_TA0_SHUTDOWN |
> -        CPU_FEATURE_ASR17,
> +        CPU_FEATURE_ASR17 | CPU_FEATURE_CACHE_CTRL,
>     },
>  #endif
>  };
> diff --git a/target-sparc/op_helper.c b/target-sparc/op_helper.c
> index d3e1b63..854f168 100644
> --- a/target-sparc/op_helper.c
> +++ b/target-sparc/op_helper.c
> @@ -1653,7 +1653,7 @@ static void dump_asi(const char *txt, target_ulong addr, int asi, int size,
>
>  /* Leon3 cache control */
>
> -void leon3_cache_control_int(void)
> +static void leon3_cache_control_int(void)
>  {
>     uint32_t state = 0;
>
> @@ -1741,11 +1741,17 @@ static uint64_t leon3_cache_control_ld(target_ulong addr, int size)
>         DPRINTF_CACHE_CONTROL("read unknown register %08x\n", addr);
>         break;
>     };
> -    DPRINTF_CACHE_CONTROL("st addr:%08x, ret:%" PRIx64 ", size:%d\n",
> +    DPRINTF_CACHE_CONTROL("ld addr:%08x, ret:0x%" PRIx64 ", size:%d\n",
>                           addr, ret, size);
>     return ret;
>  }
>
> +void leon3_irq_manager(void *irq_manager, int intno)
> +{
> +    leon3_irq_ack(irq_manager, intno);
> +    leon3_cache_control_int();
> +}
> +
>  uint64_t helper_ld_asi(target_ulong addr, int asi, int size, int sign)
>  {
>     uint64_t ret = 0;
> @@ -1760,7 +1766,9 @@ uint64_t helper_ld_asi(target_ulong addr, int asi, int size, int sign)
>         case 0x00:          /* Leon3 Cache Control */
>         case 0x08:          /* Leon3 Instruction Cache config */
>         case 0x0C:          /* Leon3 Date Cache config */
> -            ret = leon3_cache_control_ld(addr, size);
> +            if (env->def->features & CPU_FEATURE_CACHE_CTRL) {
> +                ret = leon3_cache_control_ld(addr, size);
> +            }
>             break;
>         case 0x01c00a00: /* MXCC control register */
>             if (size == 8)
> @@ -1994,7 +2002,9 @@ void helper_st_asi(target_ulong addr, uint64_t val, int asi, int size)
>         case 0x00:          /* Leon3 Cache Control */
>         case 0x08:          /* Leon3 Instruction Cache config */
>         case 0x0C:          /* Leon3 Date Cache config */
> -            leon3_cache_control_st(addr, val, size);
> +            if (env->def->features & CPU_FEATURE_CACHE_CTRL) {
> +                leon3_cache_control_st(addr, val, size);
> +            }
>             break;
>
>         case 0x01c00000: /* MXCC stream data register 0 */
> --
> 1.7.1
>
>
>