diff options
| -rw-r--r-- | include/drm/drm_os_linux.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/drm/drm_os_linux.h b/include/drm/drm_os_linux.h index 8dbd2572b7c..013551d03c0 100644 --- a/include/drm/drm_os_linux.h +++ b/include/drm/drm_os_linux.h @@ -6,6 +6,19 @@ #include <linux/interrupt.h> /* For task queue support */ #include <linux/delay.h> +#ifndef readq +static u64 readq(void __iomem *reg) +{ + return ((u64) readl(reg)) | (((u64) readl(reg + 4UL)) << 32); +} + +static void writeq(u64 val, void __iomem *reg) +{ + writel(val & 0xffffffff, reg); + writel(val >> 32, reg + 0x4UL); +} +#endif + /** Current process ID */ #define DRM_CURRENTPID task_pid_nr(current) #define DRM_SUSER(p) capable(CAP_SYS_ADMIN) @@ -23,6 +36,12 @@ /** Write a dword into a MMIO region */ #define DRM_WRITE32(map, offset, val) writel(val, ((void __iomem *)(map)->handle) + (offset)) /** Read memory barrier */ + +/** Read a qword from a MMIO region - be careful using these unless you really understand them */ +#define DRM_READ64(map, offset) readq(((void __iomem *)(map)->handle) + (offset)) +/** Write a qword into a MMIO region */ +#define DRM_WRITE64(map, offset, val) writeq(val, ((void __iomem *)(map)->handle) + (offset)) + #define DRM_READMEMORYBARRIER() rmb() /** Write memory barrier */ #define DRM_WRITEMEMORYBARRIER() wmb() |