drm/nouveau/bios: pull in basic vbios subdev, more to come later

v2: Ben Skeggs <bskeggs@redhat.com>
- use unaligned macros to access vbios image
- endianness fixes

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/Makefile

@@ -18,6 +18,8 @@ nouveau-y += core/core/printk.o
 nouveau-y += core/core/ramht.o
 nouveau-y += core/core/subdev.o
 
+nouveau-y += core/subdev/bios/base.o
+nouveau-y += core/subdev/bios/bit.o
 nouveau-y += core/subdev/device/base.o
 nouveau-y += core/subdev/device/nv04.o
 nouveau-y += core/subdev/device/nv10.o

drivers/gpu/drm/nouveau/core/include/subdev/bios.h

@@ -0,0 +1,34 @@
+#ifndef __NOUVEAU_BIOS_H__
+#define __NOUVEAU_BIOS_H__
+
+#include <core/subdev.h>
+#include <core/device.h>
+
+struct nouveau_bios {
+	struct nouveau_subdev base;
+	u32 size;
+	u8 *data;
+
+	u32 bmp_offset;
+	u32 bit_offset;
+
+	struct {
+		u8 major;
+		u8 chip;
+		u8 minor;
+		u8 micro;
+	} version;
+};
+
+static inline struct nouveau_bios *
+nouveau_bios(void *obj)
+{
+	return (void *)nv_device(obj)->subdev[NVDEV_SUBDEV_VBIOS];
+}
+
+u8  nvbios_checksum(const u8 *data, int size);
+u16 nvbios_findstr(const u8 *data, int size, const char *str, int len);
+
+extern struct nouveau_oclass nouveau_bios_oclass;
+
+#endif

drivers/gpu/drm/nouveau/core/include/subdev/bios/bit.h

@@ -0,0 +1,13 @@
+#ifndef __NVBIOS_BIT_H__
+#define __NVBIOS_BIT_H__
+
+struct bit_entry {
+	u8  id;
+	u8  version;
+	u16 length;
+	u16 offset;
+};
+
+int bit_entry(struct nouveau_bios *, u8 id, struct bit_entry *);
+
+#endif

drivers/gpu/drm/nouveau/core/include/subdev/bios/bmp.h

@@ -0,0 +1,39 @@
+#ifndef __NVBIOS_BMP_H__
+#define __NVBIOS_BMP_H__
+
+static inline u16
+bmp_version(struct nouveau_bios *bios)
+{
+	if (bios->bmp_offset) {
+		return nv_ro08(bios, bios->bmp_offset + 5) << 8 |
+		       nv_ro08(bios, bios->bmp_offset + 6);
+	}
+
+	return 0x0000;
+}
+
+static inline u16
+bmp_mem_init_table(struct nouveau_bios *bios)
+{
+	if (bmp_version(bios) >= 0x0300)
+		return nv_ro16(bios, bios->bmp_offset + 24);
+	return 0x0000;
+}
+
+static inline u16
+bmp_sdr_seq_table(struct nouveau_bios *bios)
+{
+	if (bmp_version(bios) >= 0x0300)
+		return nv_ro16(bios, bios->bmp_offset + 26);
+	return 0x0000;
+}
+
+static inline u16
+bmp_ddr_seq_table(struct nouveau_bios *bios)
+{
+	if (bmp_version(bios) >= 0x0300)
+		return nv_ro16(bios, bios->bmp_offset + 28);
+	return 0x0000;
+}
+
+#endif

drivers/gpu/drm/nouveau/core/os.h

@@ -18,6 +18,8 @@
 
 #include <asm/unaligned.h>
 
+#include <asm/unaligned.h>
+
 static inline int
 ffsll(u64 mask)
 {