From eece5764092063f3f7a091a8b42935e9cb1a37ff Mon Sep 17 00:00:00 2001 From: Jiajie Chen Date: Tue, 22 Aug 2023 09:13:48 +0200 Subject: [PATCH] target/loongarch: Support LoongArch32 DMW LA32 uses a different encoding for CSR.DMW and a new direct mapping mechanism. Signed-off-by: Jiajie Chen Reviewed-by: Richard Henderson Signed-off-by: Song Gao Message-ID: <20230822032724.1353391-3-gaosong@loongson.cn> Message-Id: <20230822071405.35386-3-philmd@linaro.org> --- target/loongarch/cpu-csr.h | 7 +++---- target/loongarch/tlb_helper.c | 26 +++++++++++++++++++++++--- 2 files changed, 26 insertions(+), 7 deletions(-) diff --git a/target/loongarch/cpu-csr.h b/target/loongarch/cpu-csr.h index 48ed2e0632..b93f99a9ef 100644 --- a/target/loongarch/cpu-csr.h +++ b/target/loongarch/cpu-csr.h @@ -188,10 +188,9 @@ FIELD(CSR_DMW, PLV1, 1, 1) FIELD(CSR_DMW, PLV2, 2, 1) FIELD(CSR_DMW, PLV3, 3, 1) FIELD(CSR_DMW, MAT, 4, 2) -FIELD(CSR_DMW, VSEG, 60, 4) - -#define dmw_va2pa(va) \ - (va & MAKE_64BIT_MASK(0, TARGET_VIRT_ADDR_SPACE_BITS)) +FIELD(CSR_DMW_32, PSEG, 25, 3) +FIELD(CSR_DMW_32, VSEG, 29, 3) +FIELD(CSR_DMW_64, VSEG, 60, 4) /* Debug CSRs */ #define LOONGARCH_CSR_DBG 0x500 /* debug config */ diff --git a/target/loongarch/tlb_helper.c b/target/loongarch/tlb_helper.c index cef10e2257..1f8e7911c7 100644 --- a/target/loongarch/tlb_helper.c +++ b/target/loongarch/tlb_helper.c @@ -173,6 +173,18 @@ static int loongarch_map_address(CPULoongArchState *env, hwaddr *physical, return TLBRET_NOMATCH; } +static hwaddr dmw_va2pa(CPULoongArchState *env, target_ulong va, + target_ulong dmw) +{ + if (is_la64(env)) { + return va & TARGET_VIRT_MASK; + } else { + uint32_t pseg = FIELD_EX32(dmw, CSR_DMW_32, PSEG); + return (va & MAKE_64BIT_MASK(0, R_CSR_DMW_32_VSEG_SHIFT)) | \ + (pseg << R_CSR_DMW_32_VSEG_SHIFT); + } +} + static int get_physical_address(CPULoongArchState *env, hwaddr *physical, int *prot, target_ulong address, MMUAccessType access_type, int mmu_idx) @@ -192,12 +204,20 @@ static int get_physical_address(CPULoongArchState *env, hwaddr *physical, } plv = kernel_mode | (user_mode << R_CSR_DMW_PLV3_SHIFT); - base_v = address >> R_CSR_DMW_VSEG_SHIFT; + if (is_la64(env)) { + base_v = address >> R_CSR_DMW_64_VSEG_SHIFT; + } else { + base_v = address >> R_CSR_DMW_32_VSEG_SHIFT; + } /* Check direct map window */ for (int i = 0; i < 4; i++) { - base_c = FIELD_EX64(env->CSR_DMW[i], CSR_DMW, VSEG); + if (is_la64(env)) { + base_c = FIELD_EX64(env->CSR_DMW[i], CSR_DMW_64, VSEG); + } else { + base_c = FIELD_EX64(env->CSR_DMW[i], CSR_DMW_32, VSEG); + } if ((plv & env->CSR_DMW[i]) && (base_c == base_v)) { - *physical = dmw_va2pa(address); + *physical = dmw_va2pa(env, address, env->CSR_DMW[i]); *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; return TLBRET_MATCH; }