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/*
* Copyright 2008-2010 Freescale Semiconductor, Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/processor.h>
#include <asm/mmu.h>
#include <ioports.h>
#include <lmb.h>
#include <asm/io.h>
#include <asm/mp.h>
DECLARE_GLOBAL_DATA_PTR;
int cpu_reset(int nr)
{
/* dummy function so common/cmd_mp.c will build
* should be implemented in the future, when cpu_release()
* is supported. Be aware there may be a similiar bug
* as exists on MPC85xx w/its PIC having a timing window
* associated to resetting the core */
return 1;
}
int cpu_status(int nr)
{
/* dummy function so common/cmd_mp.c will build */
return 0;
}
int cpu_disable(int nr)
{
/* dummy function so common/cmd_mp.c will build */
return 1;
}
int cpu_release(int nr, int argc, char *argv[])
{
/* dummy function so common/cmd_mp.c will build
* should be implemented in the future */
return 1;
}
u32 determine_mp_bootpg(void)
{
/* if we have 4G or more of memory, put the boot page at 4Gb-1M */
if ((u64)gd->ram_size > 0xfffff000)
return (0xfff00000);
return (gd->ram_size - (1024 * 1024));
}
void cpu_mp_lmb_reserve(struct lmb *lmb)
{
u32 bootpg = determine_mp_bootpg();
/* 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 = determine_mp_bootpg();
u32 bootpg_va;
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));
}
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