87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
/*
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* Relocate bridge's register base and call board specific routine.
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*
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* Author: Mark A. Greer <source@mvista.com>
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*
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* 2005 (c) MontaVista Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <linux/config.h>
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#include <linux/types.h>
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#include <asm/io.h>
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#include <asm/mv64x60_defs.h>
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extern struct bi_record *decompress_kernel(unsigned long load_addr,
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int num_words, unsigned long cksum);
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u32 size_reg[MV64x60_CPU2MEM_WINDOWS] = {
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MV64x60_CPU2MEM_0_SIZE, MV64x60_CPU2MEM_1_SIZE,
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MV64x60_CPU2MEM_2_SIZE, MV64x60_CPU2MEM_3_SIZE
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};
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/* Read mem ctlr to get the amount of mem in system */
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unsigned long
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mv64360_get_mem_size(void)
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{
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u32 enables, i, v;
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u32 mem = 0;
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enables = in_le32((void __iomem *)CONFIG_MV64X60_NEW_BASE +
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MV64360_CPU_BAR_ENABLE) & 0xf;
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for (i=0; i<MV64x60_CPU2MEM_WINDOWS; i++)
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if (!(enables & (1<<i))) {
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v = in_le32((void __iomem *)CONFIG_MV64X60_NEW_BASE
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+ size_reg[i]) & 0xffff;
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v = (v + 1) << 16;
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mem += v;
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}
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return mem;
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}
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void
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mv64x60_move_base(void __iomem *old_base, void __iomem *new_base)
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{
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u32 bits, mask, b;
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if (old_base != new_base) {
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#ifdef CONFIG_GT64260
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bits = 12;
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mask = 0x07000000;
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#else /* Must be mv64[34]60 */
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bits = 16;
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mask = 0x03000000;
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#endif
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b = in_le32(old_base + MV64x60_INTERNAL_SPACE_DECODE);
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b &= mask;
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b |= ((u32)new_base >> (32 - bits));
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out_le32(old_base + MV64x60_INTERNAL_SPACE_DECODE, b);
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__asm__ __volatile__("sync");
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/* Wait for change to happen (in accordance with the manual) */
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while (in_le32(new_base + MV64x60_INTERNAL_SPACE_DECODE) != b);
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}
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}
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void __attribute__ ((weak))
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mv64x60_board_init(void __iomem *old_base, void __iomem *new_base)
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{
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}
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void *
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load_kernel(unsigned long load_addr, int num_words, unsigned long cksum,
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void *ign1, void *ign2)
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{
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mv64x60_move_base((void __iomem *)CONFIG_MV64X60_BASE,
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(void __iomem *)CONFIG_MV64X60_NEW_BASE);
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mv64x60_board_init((void __iomem *)CONFIG_MV64X60_BASE,
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(void __iomem *)CONFIG_MV64X60_NEW_BASE);
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return decompress_kernel(load_addr, num_words, cksum);
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}
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