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/*
* arch/ppc/boot/simple/misc-mv64x60.c
*
* Relocate bridge's register base and call board specific routine.
*
* Author: Mark A. Greer <source@mvista.com>
*
* 2005 (c) MontaVista Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <linux/config.h>
#include <linux/types.h>
#include <asm/io.h>
#include <asm/mv64x60_defs.h>
extern struct bi_record *decompress_kernel(unsigned long load_addr,
int num_words, unsigned long cksum);
u32 size_reg[MV64x60_CPU2MEM_WINDOWS] = {
MV64x60_CPU2MEM_0_SIZE, MV64x60_CPU2MEM_1_SIZE,
MV64x60_CPU2MEM_2_SIZE, MV64x60_CPU2MEM_3_SIZE
};
/* Read mem ctlr to get the amount of mem in system */
unsigned long
mv64360_get_mem_size(void)
{
u32 enables, i, v;
u32 mem = 0;
enables = in_le32((void __iomem *)CONFIG_MV64X60_NEW_BASE +
MV64360_CPU_BAR_ENABLE) & 0xf;
for (i=0; i<MV64x60_CPU2MEM_WINDOWS; i++)
if (!(enables & (1<<i))) {
v = in_le32((void __iomem *)CONFIG_MV64X60_NEW_BASE
+ size_reg[i]) & 0xffff;
v = (v + 1) << 16;
mem += v;
}
return mem;
}
void
mv64x60_move_base(void __iomem *old_base, void __iomem *new_base)
{
u32 bits, mask, b;
if (old_base != new_base) {
#ifdef CONFIG_GT64260
bits = 12;
mask = 0x07000000;
#else /* Must be mv64[34]60 */
bits = 16;
mask = 0x03000000;
#endif
b = in_le32(old_base + MV64x60_INTERNAL_SPACE_DECODE);
b &= mask;
b |= ((u32)new_base >> (32 - bits));
out_le32(old_base + MV64x60_INTERNAL_SPACE_DECODE, b);
__asm__ __volatile__("sync");
/* Wait for change to happen (in accordance with the manual) */
while (in_le32(new_base + MV64x60_INTERNAL_SPACE_DECODE) != b);
}
}
void __attribute__ ((weak))
mv64x60_board_init(void __iomem *old_base, void __iomem *new_base)
{
}
void *
load_kernel(unsigned long load_addr, int num_words, unsigned long cksum,
void *ign1, void *ign2)
{
mv64x60_move_base((void __iomem *)CONFIG_MV64X60_BASE,
(void __iomem *)CONFIG_MV64X60_NEW_BASE);
mv64x60_board_init((void __iomem *)CONFIG_MV64X60_BASE,
(void __iomem *)CONFIG_MV64X60_NEW_BASE);
return decompress_kernel(load_addr, num_words, cksum);
}
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