mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-04 05:50:17 +00:00
1266df8877
We put the bootpg for the secondary cpus into memory and use BPTR to get to it. This is a step towards converting to the ePAPR boot methodology. Also, the code is written to deal properly with more than 4GB of RAM. Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
#include <common.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/mmu.h>
|
|
#include <ioports.h>
|
|
#include <lmb.h>
|
|
#include <asm/io.h>
|
|
#include "mp.h"
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#if (CONFIG_NUM_CPUS > 1)
|
|
void cpu_mp_lmb_reserve(struct lmb *lmb)
|
|
{
|
|
u32 bootpg;
|
|
|
|
/* if we have 4G or more of memory, put the boot page at 4Gb-1M */
|
|
if ((u64)gd->ram_size > 0xfffff000)
|
|
bootpg = 0xfff00000;
|
|
else
|
|
bootpg = gd->ram_size - (1024 * 1024);
|
|
|
|
/* tell u-boot we stole a page */
|
|
lmb_reserve(lmb, bootpg, 4096);
|
|
}
|
|
|
|
/*
|
|
* Copy the code for other cpus to execute into an
|
|
* aligned location accessible via BPTR
|
|
*/
|
|
void setup_mp(void)
|
|
{
|
|
extern ulong __secondary_start_page;
|
|
ulong fixup = (ulong)&__secondary_start_page;
|
|
u32 bootpg;
|
|
u32 bootpg_va;
|
|
|
|
/*
|
|
* If we have 4G or more of memory, put the boot page at 4Gb-1M.
|
|
* Otherwise, put it at the very end of RAM.
|
|
*/
|
|
if (gd->ram_size > 0xfffff000)
|
|
bootpg = 0xfff00000;
|
|
else
|
|
bootpg = gd->ram_size - (1024 * 1024);
|
|
|
|
if (bootpg >= CONFIG_SYS_MAX_DDR_BAT_SIZE) {
|
|
/* We're not covered by the DDR mapping, set up BAT */
|
|
write_bat(DBAT7, CONFIG_SYS_SCRATCH_VA | BATU_BL_128K |
|
|
BATU_VS | BATU_VP,
|
|
bootpg | BATL_PP_RW | BATL_MEMCOHERENCE);
|
|
bootpg_va = CONFIG_SYS_SCRATCH_VA;
|
|
} else {
|
|
bootpg_va = bootpg;
|
|
}
|
|
|
|
memcpy((void *)bootpg_va, (void *)fixup, 4096);
|
|
flush_cache(bootpg_va, 4096);
|
|
|
|
/* remove the temporary BAT mapping */
|
|
if (bootpg >= CONFIG_SYS_MAX_DDR_BAT_SIZE)
|
|
write_bat(DBAT7, 0, 0);
|
|
|
|
/* If the physical location of bootpg is not at fff00000, set BPTR */
|
|
if (bootpg != 0xfff00000)
|
|
out_be32((uint *)(CONFIG_SYS_CCSRBAR + 0x20), 0x80000000 |
|
|
(bootpg >> 12));
|
|
}
|
|
#endif
|