For PTP_MMU our physical address is not directly mapped into virtual address space, we need to access physical memory from those fixed map segments.
Implement phys_to_virt and virt_to_phys hook to reflect this setting.
Signed-off-by: Jiaxun Yang jiaxun.yang@flygoat.com --- arch/xtensa/include/asm/addrspace.h | 2 ++ arch/xtensa/include/asm/io.h | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+)
diff --git a/arch/xtensa/include/asm/addrspace.h b/arch/xtensa/include/asm/addrspace.h index 920b5fd26b20..c8bed8834b55 100644 --- a/arch/xtensa/include/asm/addrspace.h +++ b/arch/xtensa/include/asm/addrspace.h @@ -7,6 +7,8 @@ #ifndef _XTENSA_ADDRSPACE_H #define _XTENSA_ADDRSPACE_H
+#include <config.h> + #include <asm/arch/core.h>
/* diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h index 87ad9faa2995..ab2438b829ac 100644 --- a/arch/xtensa/include/asm/io.h +++ b/arch/xtensa/include/asm/io.h @@ -12,6 +12,8 @@ #include <linux/types.h> #include <asm/byteorder.h>
+#include <asm/addrspace.h> + /* * swap functions to change byte order from little-endian to big-endian and * vice versa. @@ -127,6 +129,36 @@ static inline void sync(void) { }
+#if XCHAL_HAVE_PTP_MMU +static inline void *phys_to_virt(phys_addr_t paddr) +{ + if (paddr >= CFG_SYS_IO_BASE) + return (void *)(unsigned long)paddr; + + if (paddr < CFG_MAX_MEM_MAPPED) + return (void *)(unsigned long)MEMADDR(paddr); + + return NULL; +} + +#define phys_to_virt phys_to_virt + +static inline phys_addr_t virt_to_phys(void *vaddr) +{ + unsigned long addr = (unsigned long)vaddr; + + if (addr >= CFG_SYS_IO_BASE) + return addr; + + if (addr >= CFG_SYS_SDRAM_BASE && addr < MEMADDR(CFG_MAX_MEM_MAPPED)) + return PHYSADDR(addr); + + return 0; +} + +#define virt_to_phys virt_to_phys +#endif /* XCHAL_HAVE_PTP_MMU */ + #include <asm-generic/io.h>
#endif /* _XTENSA_IO_H */