On Mon, Dec 16, 2013 at 02:12:38PM +0000, James Hogan wrote:
> Add preprocessor definitions for 32bit segment bases for use in
> get_physical_address(). These will also be taken advantage of in the
> next patch which adds KVM awareness.
>
> Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
> Cc: Aurelien Jarno <aurelien@xxxxxxxxxxx>
> ---
> target-mips/helper.c | 18 ++++++++++++------
> 1 file changed, 12 insertions(+), 6 deletions(-)
>
> diff --git a/target-mips/helper.c b/target-mips/helper.c
> index 33e0e88..2e96655 100644
> --- a/target-mips/helper.c
> +++ b/target-mips/helper.c
> @@ -118,7 +118,13 @@ static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
> qemu_log("user mode %d h %08x\n", user_mode, env->hflags);
> #endif
>
> - if (address <= (int32_t)0x7FFFFFFFUL) {
> +#define USEG_LIMIT 0x7FFFFFFFUL
> +#define KSEG0_BASE 0x80000000UL
> +#define KSEG1_BASE 0xA0000000UL
> +#define KSEG2_BASE 0xC0000000UL
> +#define KSEG3_BASE 0xE0000000UL
> +
> + if (address <= USEG_LIMIT) {
> /* useg */
> if (env->CP0_Status & (1 << CP0St_ERL)) {
> *physical = address & 0xFFFFFFFF;
> @@ -160,23 +166,23 @@ static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
> ret = TLBRET_BADADDR;
> }
> #endif
> - } else if (address < (int32_t)0xA0000000UL) {
> + } else if (address < (int32_t)KSEG1_BASE) {
> /* kseg0 */
> if (kernel_mode) {
> - *physical = address - (int32_t)0x80000000UL;
> + *physical = address - (int32_t)KSEG0_BASE;
> *prot = PAGE_READ | PAGE_WRITE;
> } else {
> ret = TLBRET_BADADDR;
> }
> - } else if (address < (int32_t)0xC0000000UL) {
> + } else if (address < (int32_t)KSEG2_BASE) {
> /* kseg1 */
> if (kernel_mode) {
> - *physical = address - (int32_t)0xA0000000UL;
> + *physical = address - (int32_t)KSEG1_BASE;
> *prot = PAGE_READ | PAGE_WRITE;
> } else {
> ret = TLBRET_BADADDR;
> }
> - } else if (address < (int32_t)0xE0000000UL) {
> + } else if (address < (int32_t)KSEG3_BASE) {
> /* sseg (kseg2) */
> if (supervisor_mode || kernel_mode) {
> ret = env->tlb->map_address(env, physical, prot, address, rw, access_type);
Reviewed-by: Aurelien Jarno <aurelien@xxxxxxxxxxx>
--
Aurelien Jarno GPG: 1024D/F1BCDB73
aurelien@xxxxxxxxxxx http://www.aurel32.net
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