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Re: [Qemu-devel] [PATCH 3/3] hw/mips/mips_jazz: Remove no-longer-necessa
From: |
Philippe Mathieu-Daudé |
Subject: |
Re: [Qemu-devel] [PATCH 3/3] hw/mips/mips_jazz: Remove no-longer-necessary override of do_unassigned_access |
Date: |
Fri, 2 Aug 2019 18:30:16 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 |
On 8/2/19 6:04 PM, Peter Maydell wrote:
> Now that the MIPS CPU implementation uses the new
> do_transaction_failed hook, we can remove the old code that handled
> the do_unassigned_access hook.
>
> Signed-off-by: Peter Maydell <address@hidden>
> ---
> hw/mips/mips_jazz.c | 27 ++++-----------------------
> 1 file changed, 4 insertions(+), 23 deletions(-)
>
> diff --git a/hw/mips/mips_jazz.c b/hw/mips/mips_jazz.c
> index c64b4c78809..540943932fd 100644
> --- a/hw/mips/mips_jazz.c
> +++ b/hw/mips/mips_jazz.c
> @@ -111,18 +111,6 @@ static const MemoryRegionOps dma_dummy_ops = {
> #define MAGNUM_BIOS_SIZE_MAX 0x7e000
> #define MAGNUM_BIOS_SIZE (BIOS_SIZE < MAGNUM_BIOS_SIZE_MAX ? BIOS_SIZE :
> MAGNUM_BIOS_SIZE_MAX)
>
> -static CPUUnassignedAccess real_do_unassigned_access;
> -static void mips_jazz_do_unassigned_access(CPUState *cpu, hwaddr addr,
> - bool is_write, bool is_exec,
> - int opaque, unsigned size)
> -{
> - if (!is_exec) {
> - /* ignore invalid access (ie do not raise exception) */
> - return;
> - }
> - (*real_do_unassigned_access)(cpu, addr, is_write, is_exec, opaque, size);
> -}
> -
> static void (*real_do_transaction_failed)(CPUState *cpu, hwaddr physaddr,
> vaddr addr, unsigned size,
> MMUAccessType access_type,
> @@ -184,9 +172,8 @@ static void mips_jazz_init(MachineState *machine,
> * However, we can't simply add a global memory region to catch
> * everything, as this would make all accesses including instruction
> * accesses be ignored and not raise exceptions.
> - * So instead we hijack either the do_unassigned_access method or
> - * the do_transaction_failed method on the CPU, and do not raise
> exceptions
> - * for data access.
> + * So instead we hijack the do_transaction_failed method on the CPU, and
> + * do not raise exceptions for data access.
> *
> * NOTE: this behaviour of raising exceptions for bad instruction
> * fetches but not bad data accesses was added in commit 54e755588cf1e9
> @@ -197,14 +184,8 @@ static void mips_jazz_init(MachineState *machine,
> * memory region that catches all memory accesses, as we do on Malta.
> */
> cc = CPU_GET_CLASS(cpu);
> - if (cc->do_unassigned_access) {
> - real_do_unassigned_access = cc->do_unassigned_access;
> - cc->do_unassigned_access = mips_jazz_do_unassigned_access;
> - }
> - if (cc->do_transaction_failed) {
> - real_do_transaction_failed = cc->do_transaction_failed;
> - cc->do_transaction_failed = mips_jazz_do_transaction_failed;
> - }
> + real_do_transaction_failed = cc->do_transaction_failed;
> + cc->do_transaction_failed = mips_jazz_do_transaction_failed;
>
> /* allocate RAM */
> memory_region_allocate_system_memory(ram, NULL, "mips_jazz.ram",
>
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
- [Qemu-devel] [PATCH 0/3] target/mips: Convert to do_transaction_failed hook, Peter Maydell, 2019/08/02
- [Qemu-devel] [PATCH 1/3] hw/mips/mips_jazz: Override do_transaction_failed hook, Peter Maydell, 2019/08/02
- [Qemu-devel] [PATCH 2/3] target/mips: Switch to do_transaction_failed() hook, Peter Maydell, 2019/08/02
- [Qemu-devel] [PATCH 3/3] hw/mips/mips_jazz: Remove no-longer-necessary override of do_unassigned_access, Peter Maydell, 2019/08/02
- Re: [Qemu-devel] [PATCH 3/3] hw/mips/mips_jazz: Remove no-longer-necessary override of do_unassigned_access,
Philippe Mathieu-Daudé <=
- Re: [Qemu-devel] [PATCH 0/3] target/mips: Convert to do_transaction_failed hook, Philippe Mathieu-Daudé, 2019/08/02
- Re: [Qemu-devel] [PATCH 0/3] target/mips: Convert to do_transaction_failed hook, Aleksandar Markovic, 2019/08/22