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path: root/drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h
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Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h
index 9efdd66279e5..975afa04df09 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h
@@ -21,6 +21,15 @@
#ifndef __AMDGPU_UMC_H__
#define __AMDGPU_UMC_H__
+/* implement 64 bits REG operations via 32 bits interface */
+#define RREG64_UMC(reg) (RREG32(reg) | \
+ ((uint64_t)RREG32((reg) + 1) << 32))
+#define WREG64_UMC(reg, v) \
+ do { \
+ WREG32((reg), lower_32_bits(v)); \
+ WREG32((reg) + 1, upper_32_bits(v)); \
+ } while (0)
+
/*
* void (*func)(struct amdgpu_device *adev, struct ras_err_data *err_data,
* uint32_t umc_reg_offset, uint32_t channel_index)