drm/radeon: prep for r6xx/r7xx support

- add r6xx/r7xx regs and macros
- add r6xx/r7xx chip families
- fix register access for regs with offsets >= 0x10000
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_cp.c

@@ -89,6 +89,20 @@ u32 radeon_get_scratch(drm_radeon_private_t *dev_priv, int index)
 		return RADEON_READ(RADEON_SCRATCH_REG0 + 4*index);
 }
 
+u32 RADEON_READ_MM(drm_radeon_private_t *dev_priv, int addr)
+{
+	u32 ret;
+
+	if (addr < 0x10000)
+		ret = DRM_READ32(dev_priv->mmio, addr);
+	else {
+		DRM_WRITE32(dev_priv->mmio, RADEON_MM_INDEX, addr);
+		ret = DRM_READ32(dev_priv->mmio, RADEON_MM_DATA);
+	}
+
+	return ret;
+}
+
 static u32 R500_READ_MCIND(drm_radeon_private_t *dev_priv, int addr)
 {
 	u32 ret;

include/drm/radeon_drm.h

@@ -304,6 +304,8 @@ typedef union {
 
 #define RADEON_SCRATCH_REG_OFFSET	32
 
+#define R600_SCRATCH_REG_OFFSET         256
+
 #define RADEON_NR_SAREA_CLIPRECTS	12
 
 /* There are 2 heaps (local/GART).  Each region within a heap is a
@@ -526,7 +528,8 @@ typedef struct drm_radeon_init {
 		RADEON_INIT_CP = 0x01,
 		RADEON_CLEANUP_CP = 0x02,
 		RADEON_INIT_R200_CP = 0x03,
-		RADEON_INIT_R300_CP = 0x04
+		RADEON_INIT_R300_CP = 0x04,
+		RADEON_INIT_R600_CP = 0x05
 	} func;
 	unsigned long sarea_priv_offset;
 	int is_pci;