On Wed, Sep 25, 2019 at 10:58 PM Simon Glass sjg@chromium.org wrote:
At present these functions are stubbed out. For more comprehensive testing with PCI devices it is useful to be able to fully emulate I/O access. Add simple implementations for these.
Signed-off-by: Simon Glass sjg@chromium.org
arch/sandbox/cpu/cpu.c | 51 ++++++++++++++++++++++++++++++++ arch/sandbox/include/asm/io.h | 27 +++++++++++------ arch/sandbox/include/asm/state.h | 1 + drivers/nvme/nvme.h | 4 +-- 4 files changed, 72 insertions(+), 11 deletions(-)
diff --git a/arch/sandbox/cpu/cpu.c b/arch/sandbox/cpu/cpu.c index fdfb209f77d..f3af88d79e9 100644 --- a/arch/sandbox/cpu/cpu.c +++ b/arch/sandbox/cpu/cpu.c @@ -225,6 +225,57 @@ phys_addr_t map_to_sysmem(const void *ptr) return mentry->tag; }
+unsigned int sandbox_read(const void *addr, enum sandboxio_size_t size) +{
struct sandbox_state *state = state_get_current();if (!state->allow_memio)return 0;switch (size) {case SB_SIZE_8:return *(u8 *)addr;case SB_SIZE_16:return *(u16 *)addr;case SB_SIZE_32:return *(u32 *)addr;case SB_SIZE_64:return *(u64 *)addr;}return 0;+}
+void sandbox_write(void *addr, unsigned int val, enum sandboxio_size_t size)
const void *addr
+{
struct sandbox_state *state = state_get_current();if (!state->allow_memio)return;switch (size) {case SB_SIZE_8:*(u8 *)addr = val;break;case SB_SIZE_16:*(u16 *)addr = val;break;case SB_SIZE_32:*(u32 *)addr = val;break;case SB_SIZE_64:*(u64 *)addr = val;break;}+}
+void sandbox_set_enable_memio(bool enable) +{
struct sandbox_state *state = state_get_current();state->allow_memio = enable;+}
void sandbox_set_enable_pci_map(int enable) { enable_pci_map = enable; diff --git a/arch/sandbox/include/asm/io.h b/arch/sandbox/include/asm/io.h index 481787b516b..2bbaff26a61 100644 --- a/arch/sandbox/include/asm/io.h +++ b/arch/sandbox/include/asm/io.h @@ -6,6 +6,13 @@ #ifndef __SANDBOX_ASM_IO_H #define __SANDBOX_ASM_IO_H
+enum sandboxio_size_t {
SB_SIZE_8,SB_SIZE_16,SB_SIZE_32,SB_SIZE_64,+};
void *phys_to_virt(phys_addr_t paddr); #define phys_to_virt phys_to_virt
@@ -38,18 +45,20 @@ static inline void unmap_sysmem(const void *vaddr) /* Map from a pointer to our RAM buffer */ phys_addr_t map_to_sysmem(const void *ptr);
-/* Define nops for sandbox I/O access */ -#define readb(addr) ((void)addr, 0) -#define readw(addr) ((void)addr, 0) -#define readl(addr) ((void)addr, 0) +unsigned int sandbox_read(const void *addr, enum sandboxio_size_t size); +void sandbox_write(void *addr, unsigned int val, enum sandboxio_size_t size);
+#define readb(addr) sandbox_read(addr, SB_SIZE_8) +#define readw(addr) sandbox_read(addr, SB_SIZE_16) +#define readl(addr) sandbox_read(addr, SB_SIZE_32) #ifdef CONFIG_SANDBOX64 -#define readq(addr) ((void)addr, 0) +#define readq(addr) sandbox_read(addr, SB_SIZE_64) #endif -#define writeb(v, addr) ((void)addr) -#define writew(v, addr) ((void)addr) -#define writel(v, addr) ((void)addr) +#define writeb(v, addr) sandbox_write(addr, v, SB_SIZE_8) +#define writew(v, addr) sandbox_write(addr, v, SB_SIZE_16) +#define writel(v, addr) sandbox_write(addr, v, SB_SIZE_32) #ifdef CONFIG_SANDBOX64 -#define writeq(v, addr) ((void)addr) +#define writeq(v, addr) sandbox_write(addr, v, SB_SIZE_64) #endif
/* diff --git a/arch/sandbox/include/asm/state.h b/arch/sandbox/include/asm/state.h index 2d773d3fa6b..ad3e94beb9a 100644 --- a/arch/sandbox/include/asm/state.h +++ b/arch/sandbox/include/asm/state.h @@ -102,6 +102,7 @@ struct sandbox_state { ulong next_tag; /* Next address tag to allocate */ struct list_head mapmem_head; /* struct sandbox_mapmem_entry */ bool hwspinlock; /* Hardware Spinlock status */
bool allow_memio; /* Allow readl() etc. to work */ /* * This struct is getting large.diff --git a/drivers/nvme/nvme.h b/drivers/nvme/nvme.h index 922f7abfe85..c56ea7e58e6 100644 --- a/drivers/nvme/nvme.h +++ b/drivers/nvme/nvme.h @@ -536,7 +536,7 @@ struct nvme_completion { static inline u64 nvme_readq(__le64 volatile *regs) { #if BITS_PER_LONG == 64
return readq(regs);
return readq((__le64 *)regs);
This cast is not needed
#else __u32 *ptr = (__u32 *)regs; u64 val_lo = readl(ptr); @@ -549,7 +549,7 @@ static inline u64 nvme_readq(__le64 volatile *regs) static inline void nvme_writeq(const u64 val, __le64 volatile *regs) { #if BITS_PER_LONG == 64
writeq(val, regs);
writeq(val, (__le64 *)regs);
Ditto
#else __u32 *ptr = (__u32 *)regs; u32 val_lo = lower_32_bits(val); --
Other than above,
Reviewed-by: Bin Meng bmeng.cn@gmail.com Tested-by: Bin Meng bmeng.cn@gmail.com