Re: [Qemu-devel] [PATCH 14/14] target-arm: Move A9 config_base_address reset value to ARMCPU

[Mark Langsdorf <mark.langsdorf@calxeda.com>]

Odd that I wasn't actually cc'd by the mailer on this.

Do you want me to pull together a patch to make it a QOM property now,
or is there some other dependency I should wait on? It may take me a
week or so to get time to pull it together and test it.

--Mark Langsdorf
Calxeda, Inc.

On 03/30/2012 07:51 AM, Peter Maydell wrote:
> Move the A9 config_base_address cp15 register reset value to
> ARMCPU. This should become a QOM property so that the Highbank
> board can set it without having to pull in cpu-qom.h, but at
> least this avoids the implicit dependency on reset ordering
> that the previous workaround had.
> 
> Cc: Mark Langsdorf <mark.langsdorf@calxeda.com>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
>  hw/highbank.c        |   12 +++++-------
>  target-arm/cpu-qom.h |    1 +
>  target-arm/cpu.c     |    4 +---
>  3 files changed, 7 insertions(+), 10 deletions(-)
> 
> diff --git a/hw/highbank.c b/hw/highbank.c
> index 906eed5..b007f97 100644
> --- a/hw/highbank.c
> +++ b/hw/highbank.c
> @@ -27,6 +27,7 @@
>  #include "sysbus.h"
>  #include "blockdev.h"
>  #include "exec-memory.h"
> +#include "cpu-qom.h"
>  
>  #define SMP_BOOT_ADDR 0x100
>  #define SMP_BOOT_REG  0x40
> @@ -35,12 +36,6 @@
>  #define NIRQ_GIC      160
>  
>  /* Board init.  */
> -static void highbank_cpu_reset(void *opaque)
> -{
> -    CPUARMState *env = opaque;
> -
> -    env->cp15.c15_config_base_address = GIC_BASE_ADDR;
> -}
>  
>  static void hb_write_secondary(CPUARMState *env, const struct arm_boot_info *info)
>  {
> @@ -213,14 +208,17 @@ static void highbank_init(ram_addr_t ram_size,
>      }
>  
>      for (n = 0; n < smp_cpus; n++) {
> +        ARMCPU *cpu;
>          env = cpu_init(cpu_model);
>          if (!env) {
>              fprintf(stderr, "Unable to find CPU definition\n");
>              exit(1);
>          }
> +        cpu = arm_env_get_cpu(env);
> +        /* This will become a QOM property eventually */
> +        cpu->reset_cbar = GIC_BASE_ADDR;
>          irqp = arm_pic_init_cpu(env);
>          cpu_irq[n] = irqp[ARM_PIC_CPU_IRQ];
> -        qemu_register_reset(highbank_cpu_reset, env);
>      }
>  
>      sysmem = get_system_memory();
> diff --git a/target-arm/cpu-qom.h b/target-arm/cpu-qom.h
> index 55dc920..c42755a 100644
> --- a/target-arm/cpu-qom.h
> +++ b/target-arm/cpu-qom.h
> @@ -84,6 +84,7 @@ typedef struct ARMCPU {
>      uint32_t id_isar5;
>      uint32_t clidr;
>      uint32_t ccsidr[16];
> +    uint32_t reset_cbar;
>  } ARMCPU;
>  
>  static inline ARMCPU *arm_env_get_cpu(CPUARMState *env)
> diff --git a/target-arm/cpu.c b/target-arm/cpu.c
> index 66f76a8..653e2b3 100644
> --- a/target-arm/cpu.c
> +++ b/target-arm/cpu.c
> @@ -30,7 +30,6 @@ static void arm_cpu_reset(CPUState *s)
>      ARMCPU *cpu = ARM_CPU(s);
>      ARMCPUClass *acc = ARM_CPU_GET_CLASS(cpu);
>      CPUARMState *env = &cpu->env;
> -    uint32_t tmp = 0;
>  
>      if (qemu_loglevel_mask(CPU_LOG_RESET)) {
>          qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
> @@ -39,9 +38,8 @@ static void arm_cpu_reset(CPUState *s)
>  
>      acc->parent_reset(s);
>  
> -    tmp = env->cp15.c15_config_base_address;
>      memset(env, 0, offsetof(CPUARMState, breakpoints));
> -    env->cp15.c15_config_base_address = tmp;
> +    env->cp15.c15_config_base_address = cpu->reset_cbar;
>      env->cp15.c0_cpuid = cpu->midr;
>      env->vfp.xregs[ARM_VFP_FPSID] = cpu->reset_fpsid;
>      env->vfp.xregs[ARM_VFP_MVFR0] = cpu->mvfr0;