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Diffstat (limited to 'arch/powerpc/cpu/mpc86xx/mp.c')
-rw-r--r--arch/powerpc/cpu/mpc86xx/mp.c125
1 files changed, 125 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc86xx/mp.c b/arch/powerpc/cpu/mpc86xx/mp.c
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index 0000000000..b4a0faacde
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+++ b/arch/powerpc/cpu/mpc86xx/mp.c
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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)
+{
+ volatile immap_t *immap = (immap_t *) CONFIG_SYS_CCSRBAR;
+ volatile ccsr_gur_t *gur = &immap->im_gur;
+
+ switch (nr) {
+ case 0:
+ setbits_be32(&gur->devdisr, MPC86xx_DEVDISR_CPU0);
+ break;
+ case 1:
+ setbits_be32(&gur->devdisr, MPC86xx_DEVDISR_CPU1);
+ break;
+ default:
+ printf("Invalid cpu number for disable %d\n", nr);
+ return 1;
+ }
+
+ return 0;
+}
+
+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));
+}