Symbol: RREG32
sys/dev/pci/drm/amd/amdgpu/amdgpu.h
1476
#define RREG32(reg) amdgpu_device_rreg(adev, (reg), 0)
sys/dev/pci/drm/radeon/radeon.h
2550
#define RREG32(reg) r100_mm_rreg(rdev, (reg), false)