1 files changed, 355 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/mp.c b/arch/powerpc/cpu/mpc85xx/mp.c
new file mode 100644
index 0000000..826bf32
--- /dev/null
+++ b/arch/powerpc/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");
+	}
+}