Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * arch/ppc/boot/simple/misc-mv64x60.c |
| 3 | * |
| 4 | * Relocate bridge's register base and call board specific routine. |
| 5 | * |
| 6 | * Author: Mark A. Greer <source@mvista.com> |
| 7 | * |
| 8 | * 2005 (c) MontaVista Software, Inc. This file is licensed under |
| 9 | * the terms of the GNU General Public License version 2. This program |
| 10 | * is licensed "as is" without any warranty of any kind, whether express |
| 11 | * or implied. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/config.h> |
| 15 | #include <linux/types.h> |
| 16 | #include <asm/io.h> |
| 17 | #include <asm/mv64x60_defs.h> |
| 18 | |
| 19 | extern struct bi_record *decompress_kernel(unsigned long load_addr, |
| 20 | int num_words, unsigned long cksum); |
| 21 | |
| 22 | void |
| 23 | mv64x60_move_base(void __iomem *old_base, void __iomem *new_base) |
| 24 | { |
| 25 | u32 bits, mask, b; |
| 26 | |
| 27 | if (old_base != new_base) { |
| 28 | #ifdef CONFIG_GT64260 |
| 29 | bits = 12; |
| 30 | mask = 0x07000000; |
| 31 | #else /* Must be mv64[34]60 */ |
| 32 | bits = 16; |
| 33 | mask = 0x03000000; |
| 34 | #endif |
| 35 | b = in_le32(old_base + MV64x60_INTERNAL_SPACE_DECODE); |
| 36 | b &= mask; |
| 37 | b |= ((u32)new_base >> (32 - bits)); |
| 38 | out_le32(old_base + MV64x60_INTERNAL_SPACE_DECODE, b); |
| 39 | |
| 40 | __asm__ __volatile__("sync"); |
| 41 | |
| 42 | /* Wait for change to happen (in accordance with the manual) */ |
| 43 | while (in_le32(new_base + MV64x60_INTERNAL_SPACE_DECODE) != b); |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | void __attribute__ ((weak)) |
| 48 | mv64x60_board_init(void __iomem *old_base, void __iomem *new_base) |
| 49 | { |
| 50 | } |
| 51 | |
| 52 | void * |
| 53 | load_kernel(unsigned long load_addr, int num_words, unsigned long cksum, |
| 54 | void *ign1, void *ign2) |
| 55 | { |
| 56 | mv64x60_move_base((void __iomem *)CONFIG_MV64X60_BASE, |
| 57 | (void __iomem *)CONFIG_MV64X60_NEW_BASE); |
| 58 | mv64x60_board_init((void __iomem *)CONFIG_MV64X60_BASE, |
| 59 | (void __iomem *)CONFIG_MV64X60_NEW_BASE); |
| 60 | return decompress_kernel(load_addr, num_words, cksum); |
| 61 | } |