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Diffstat (limited to 'arch/ppc/cpu/mpc85xx/mp.c')
-rw-r--r--arch/ppc/cpu/mpc85xx/mp.c355
1 files changed, 355 insertions, 0 deletions
diff --git a/arch/ppc/cpu/mpc85xx/mp.c b/arch/ppc/cpu/mpc85xx/mp.c
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+++ b/arch/ppc/cpu/mpc85xx/mp.c
@@ -0,0 +1,355 @@
+/*
+ * 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 <ioports.h>
+#include <lmb.h>
+#include <asm/io.h>
+#include <asm/mmu.h>
+#include <asm/fsl_law.h>
+#include "mp.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+u32 get_my_id()
+{
+ return mfspr(SPRN_PIR);
+}
+
+int cpu_reset(int nr)
+{
+ volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR);
+ out_be32(&pic->pir, 1 << nr);
+ /* the dummy read works around an errata on early 85xx MP PICs */
+ (void)in_be32(&pic->pir);
+ out_be32(&pic->pir, 0x0);
+
+ return 0;
+}
+
+int cpu_status(int nr)
+{
+ u32 *table, id = get_my_id();
+
+ if (nr == id) {
+ table = (u32 *)get_spin_virt_addr();
+ printf("table base @ 0x%p\n", table);
+ } else {
+ table = (u32 *)get_spin_virt_addr() + nr * NUM_BOOT_ENTRY;
+ printf("Running on cpu %d\n", id);
+ printf("\n");
+ printf("table @ 0x%p\n", table);
+ printf(" addr - 0x%08x\n", table[BOOT_ENTRY_ADDR_LOWER]);
+ printf(" pir - 0x%08x\n", table[BOOT_ENTRY_PIR]);
+ printf(" r3 - 0x%08x\n", table[BOOT_ENTRY_R3_LOWER]);
+ printf(" r6 - 0x%08x\n", table[BOOT_ENTRY_R6_LOWER]);
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_FSL_CORENET
+int cpu_disable(int nr)
+{
+ volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+
+ setbits_be32(&gur->coredisrl, 1 << nr);
+
+ return 0;
+}
+#else
+int cpu_disable(int nr)
+{
+ volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+
+ switch (nr) {
+ case 0:
+ setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU0);
+ break;
+ case 1:
+ setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU1);
+ break;
+ default:
+ printf("Invalid cpu number for disable %d\n", nr);
+ return 1;
+ }
+
+ return 0;
+}
+#endif
+
+static u8 boot_entry_map[4] = {
+ 0,
+ BOOT_ENTRY_PIR,
+ BOOT_ENTRY_R3_LOWER,
+ BOOT_ENTRY_R6_LOWER,
+};
+
+int cpu_release(int nr, int argc, char *argv[])
+{
+ u32 i, val, *table = (u32 *)get_spin_virt_addr() + nr * NUM_BOOT_ENTRY;
+ u64 boot_addr;
+
+ if (nr == get_my_id()) {
+ printf("Invalid to release the boot core.\n\n");
+ return 1;
+ }
+
+ if (argc != 4) {
+ printf("Invalid number of arguments to release.\n\n");
+ return 1;
+ }
+
+ boot_addr = simple_strtoull(argv[0], NULL, 16);
+
+ /* handle pir, r3, r6 */
+ for (i = 1; i < 4; i++) {
+ if (argv[i][0] != '-') {
+ u8 entry = boot_entry_map[i];
+ val = simple_strtoul(argv[i], NULL, 16);
+ table[entry] = val;
+ }
+ }
+
+ table[BOOT_ENTRY_ADDR_UPPER] = (u32)(boot_addr >> 32);
+
+ /* ensure all table updates complete before final address write */
+ eieio();
+
+ table[BOOT_ENTRY_ADDR_LOWER] = (u32)(boot_addr & 0xffffffff);
+
+ return 0;
+}
+
+u32 determine_mp_bootpg(void)
+{
+ /* if we have 4G or more of memory, put the boot page at 4Gb-4k */
+ if ((u64)gd->ram_size > 0xfffff000)
+ return (0xfffff000);
+
+ return (gd->ram_size - 4096);
+}
+
+ulong get_spin_phys_addr(void)
+{
+ extern ulong __secondary_start_page;
+ extern ulong __spin_table;
+
+ return (determine_mp_bootpg() +
+ (ulong)&__spin_table - (ulong)&__secondary_start_page);
+}
+
+ulong get_spin_virt_addr(void)
+{
+ extern ulong __secondary_start_page;
+ extern ulong __spin_table;
+
+ return (CONFIG_BPTR_VIRT_ADDR +
+ (ulong)&__spin_table - (ulong)&__secondary_start_page);
+}
+
+#ifdef CONFIG_FSL_CORENET
+static void plat_mp_up(unsigned long bootpg)
+{
+ u32 up, cpu_up_mask, whoami;
+ u32 *table = (u32 *)get_spin_virt_addr();
+ volatile ccsr_gur_t *gur;
+ volatile ccsr_local_t *ccm;
+ volatile ccsr_rcpm_t *rcpm;
+ volatile ccsr_pic_t *pic;
+ int timeout = 10;
+ u32 nr_cpus;
+ struct law_entry e;
+
+ gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+ ccm = (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR);
+ rcpm = (void *)(CONFIG_SYS_FSL_CORENET_RCPM_ADDR);
+ pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR);
+
+ nr_cpus = ((in_be32(&pic->frr) >> 8) & 0xff) + 1;
+
+ whoami = in_be32(&pic->whoami);
+ cpu_up_mask = 1 << whoami;
+ out_be32(&ccm->bstrl, bootpg);
+
+ e = find_law(bootpg);
+ out_be32(&ccm->bstrar, LAW_EN | e.trgt_id << 20 | LAW_SIZE_4K);
+
+ /* readback to sync write */
+ in_be32(&ccm->bstrar);
+
+ /* disable time base at the platform */
+ out_be32(&rcpm->ctbenrl, cpu_up_mask);
+
+ /* release the hounds */
+ up = ((1 << nr_cpus) - 1);
+ out_be32(&gur->brrl, up);
+
+ /* wait for everyone */
+ while (timeout) {
+ int i;
+ for (i = 0; i < nr_cpus; i++) {
+ if (table[i * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
+ cpu_up_mask |= (1 << i);
+ };
+
+ if ((cpu_up_mask & up) == up)
+ break;
+
+ udelay(100);
+ timeout--;
+ }
+
+ if (timeout == 0)
+ printf("CPU up timeout. CPU up mask is %x should be %x\n",
+ cpu_up_mask, up);
+
+ /* enable time base at the platform */
+ out_be32(&rcpm->ctbenrl, 0);
+ mtspr(SPRN_TBWU, 0);
+ mtspr(SPRN_TBWL, 0);
+ out_be32(&rcpm->ctbenrl, (1 << nr_cpus) - 1);
+
+#ifdef CONFIG_MPC8xxx_DISABLE_BPTR
+ /*
+ * Disabling Boot Page Translation allows the memory region 0xfffff000
+ * to 0xffffffff to be used normally. Leaving Boot Page Translation
+ * enabled remaps 0xfffff000 to SDRAM which makes that memory region
+ * unusable for normal operation but it does allow OSes to easily
+ * reset a processor core to put it back into U-Boot's spinloop.
+ */
+ clrbits_be32(&ecm->bptr, 0x80000000);
+#endif
+}
+#else
+static void plat_mp_up(unsigned long bootpg)
+{
+ u32 up, cpu_up_mask, whoami;
+ u32 *table = (u32 *)get_spin_virt_addr();
+ volatile u32 bpcr;
+ volatile ccsr_local_ecm_t *ecm = (void *)(CONFIG_SYS_MPC85xx_ECM_ADDR);
+ volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+ volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR);
+ u32 devdisr;
+ int timeout = 10;
+
+ whoami = in_be32(&pic->whoami);
+ out_be32(&ecm->bptr, 0x80000000 | (bootpg >> 12));
+
+ /* disable time base at the platform */
+ devdisr = in_be32(&gur->devdisr);
+ if (whoami)
+ devdisr |= MPC85xx_DEVDISR_TB0;
+ else
+ devdisr |= MPC85xx_DEVDISR_TB1;
+ out_be32(&gur->devdisr, devdisr);
+
+ /* release the hounds */
+ up = ((1 << cpu_numcores()) - 1);
+ bpcr = in_be32(&ecm->eebpcr);
+ bpcr |= (up << 24);
+ out_be32(&ecm->eebpcr, bpcr);
+ asm("sync; isync; msync");
+
+ cpu_up_mask = 1 << whoami;
+ /* wait for everyone */
+ while (timeout) {
+ int i;
+ for (i = 0; i < cpu_numcores(); i++) {
+ if (table[i * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
+ cpu_up_mask |= (1 << i);
+ };
+
+ if ((cpu_up_mask & up) == up)
+ break;
+
+ udelay(100);
+ timeout--;
+ }
+
+ if (timeout == 0)
+ printf("CPU up timeout. CPU up mask is %x should be %x\n",
+ cpu_up_mask, up);
+
+ /* enable time base at the platform */
+ if (whoami)
+ devdisr |= MPC85xx_DEVDISR_TB1;
+ else
+ devdisr |= MPC85xx_DEVDISR_TB0;
+ out_be32(&gur->devdisr, devdisr);
+ mtspr(SPRN_TBWU, 0);
+ mtspr(SPRN_TBWL, 0);
+
+ devdisr &= ~(MPC85xx_DEVDISR_TB0 | MPC85xx_DEVDISR_TB1);
+ out_be32(&gur->devdisr, devdisr);
+
+#ifdef CONFIG_MPC8xxx_DISABLE_BPTR
+ /*
+ * Disabling Boot Page Translation allows the memory region 0xfffff000
+ * to 0xffffffff to be used normally. Leaving Boot Page Translation
+ * enabled remaps 0xfffff000 to SDRAM which makes that memory region
+ * unusable for normal operation but it does allow OSes to easily
+ * reset a processor core to put it back into U-Boot's spinloop.
+ */
+ clrbits_be32(&ecm->bptr, 0x80000000);
+#endif
+}
+#endif
+
+void cpu_mp_lmb_reserve(struct lmb *lmb)
+{
+ u32 bootpg = determine_mp_bootpg();
+
+ lmb_reserve(lmb, bootpg, 4096);
+}
+
+void setup_mp(void)
+{
+ extern ulong __secondary_start_page;
+ extern ulong __bootpg_addr;
+ ulong fixup = (ulong)&__secondary_start_page;
+ u32 bootpg = determine_mp_bootpg();
+
+ /* Store the bootpg's SDRAM address for use by secondary CPU cores */
+ __bootpg_addr = bootpg;
+
+ /* look for the tlb covering the reset page, there better be one */
+ int i = find_tlb_idx((void *)CONFIG_BPTR_VIRT_ADDR, 1);
+
+ /* we found a match */
+ if (i != -1) {
+ /* map reset page to bootpg so we can copy code there */
+ disable_tlb(i);
+
+ set_tlb(1, CONFIG_BPTR_VIRT_ADDR, bootpg, /* tlb, epn, rpn */
+ MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G, /* perms, wimge */
+ 0, i, BOOKE_PAGESZ_4K, 1); /* ts, esel, tsize, iprot */
+
+ memcpy((void *)CONFIG_BPTR_VIRT_ADDR, (void *)fixup, 4096);
+
+ plat_mp_up(bootpg);
+ } else {
+ puts("WARNING: No reset page TLB. "
+ "Skipping secondary core setup\n");
+ }
+}
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