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Diffstat (limited to 'arch/powerpc/sysdev/ppc4xx_soc.c')
-rw-r--r--arch/powerpc/sysdev/ppc4xx_soc.c222
1 files changed, 0 insertions, 222 deletions
diff --git a/arch/powerpc/sysdev/ppc4xx_soc.c b/arch/powerpc/sysdev/ppc4xx_soc.c
deleted file mode 100644
index d41134d2f786..000000000000
--- a/arch/powerpc/sysdev/ppc4xx_soc.c
+++ /dev/null
@@ -1,222 +0,0 @@
-/*
- * IBM/AMCC PPC4xx SoC setup code
- *
- * Copyright 2008 DENX Software Engineering, Stefan Roese <sr@denx.de>
- *
- * L2 cache routines cloned from arch/ppc/syslib/ibm440gx_common.c which is:
- * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
- * Copyright (c) 2003 - 2006 Zultys Technologies
- *
- * 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.
- */
-
-#include <linux/stddef.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/of_irq.h>
-#include <linux/of_platform.h>
-
-#include <asm/dcr.h>
-#include <asm/dcr-regs.h>
-#include <asm/reg.h>
-
-static u32 dcrbase_l2c;
-
-/*
- * L2-cache
- */
-
-/* Issue L2C diagnostic command */
-static inline u32 l2c_diag(u32 addr)
-{
- mtdcr(dcrbase_l2c + DCRN_L2C0_ADDR, addr);
- mtdcr(dcrbase_l2c + DCRN_L2C0_CMD, L2C_CMD_DIAG);
- while (!(mfdcr(dcrbase_l2c + DCRN_L2C0_SR) & L2C_SR_CC))
- ;
-
- return mfdcr(dcrbase_l2c + DCRN_L2C0_DATA);
-}
-
-static irqreturn_t l2c_error_handler(int irq, void *dev)
-{
- u32 sr = mfdcr(dcrbase_l2c + DCRN_L2C0_SR);
-
- if (sr & L2C_SR_CPE) {
- /* Read cache trapped address */
- u32 addr = l2c_diag(0x42000000);
- printk(KERN_EMERG "L2C: Cache Parity Error, addr[16:26] = 0x%08x\n",
- addr);
- }
- if (sr & L2C_SR_TPE) {
- /* Read tag trapped address */
- u32 addr = l2c_diag(0x82000000) >> 16;
- printk(KERN_EMERG "L2C: Tag Parity Error, addr[16:26] = 0x%08x\n",
- addr);
- }
-
- /* Clear parity errors */
- if (sr & (L2C_SR_CPE | L2C_SR_TPE)){
- mtdcr(dcrbase_l2c + DCRN_L2C0_ADDR, 0);
- mtdcr(dcrbase_l2c + DCRN_L2C0_CMD, L2C_CMD_CCP | L2C_CMD_CTE);
- } else {
- printk(KERN_EMERG "L2C: LRU error\n");
- }
-
- return IRQ_HANDLED;
-}
-
-static int __init ppc4xx_l2c_probe(void)
-{
- struct device_node *np;
- u32 r;
- unsigned long flags;
- int irq;
- const u32 *dcrreg;
- u32 dcrbase_isram;
- int len;
- const u32 *prop;
- u32 l2_size;
-
- np = of_find_compatible_node(NULL, NULL, "ibm,l2-cache");
- if (!np)
- return 0;
-
- /* Get l2 cache size */
- prop = of_get_property(np, "cache-size", NULL);
- if (prop == NULL) {
- printk(KERN_ERR "%s: Can't get cache-size!\n", np->full_name);
- of_node_put(np);
- return -ENODEV;
- }
- l2_size = prop[0];
-
- /* Map DCRs */
- dcrreg = of_get_property(np, "dcr-reg", &len);
- if (!dcrreg || (len != 4 * sizeof(u32))) {
- printk(KERN_ERR "%s: Can't get DCR register base !",
- np->full_name);
- of_node_put(np);
- return -ENODEV;
- }
- dcrbase_isram = dcrreg[0];
- dcrbase_l2c = dcrreg[2];
-
- /* Get and map irq number from device tree */
- irq = irq_of_parse_and_map(np, 0);
- if (!irq) {
- printk(KERN_ERR "irq_of_parse_and_map failed\n");
- of_node_put(np);
- return -ENODEV;
- }
-
- /* Install error handler */
- if (request_irq(irq, l2c_error_handler, 0, "L2C", 0) < 0) {
- printk(KERN_ERR "Cannot install L2C error handler"
- ", cache is not enabled\n");
- of_node_put(np);
- return -ENODEV;
- }
-
- local_irq_save(flags);
- asm volatile ("sync" ::: "memory");
-
- /* Disable SRAM */
- mtdcr(dcrbase_isram + DCRN_SRAM0_DPC,
- mfdcr(dcrbase_isram + DCRN_SRAM0_DPC) & ~SRAM_DPC_ENABLE);
- mtdcr(dcrbase_isram + DCRN_SRAM0_SB0CR,
- mfdcr(dcrbase_isram + DCRN_SRAM0_SB0CR) & ~SRAM_SBCR_BU_MASK);
- mtdcr(dcrbase_isram + DCRN_SRAM0_SB1CR,
- mfdcr(dcrbase_isram + DCRN_SRAM0_SB1CR) & ~SRAM_SBCR_BU_MASK);
- mtdcr(dcrbase_isram + DCRN_SRAM0_SB2CR,
- mfdcr(dcrbase_isram + DCRN_SRAM0_SB2CR) & ~SRAM_SBCR_BU_MASK);
- mtdcr(dcrbase_isram + DCRN_SRAM0_SB3CR,
- mfdcr(dcrbase_isram + DCRN_SRAM0_SB3CR) & ~SRAM_SBCR_BU_MASK);
-
- /* Enable L2_MODE without ICU/DCU */
- r = mfdcr(dcrbase_l2c + DCRN_L2C0_CFG) &
- ~(L2C_CFG_ICU | L2C_CFG_DCU | L2C_CFG_SS_MASK);
- r |= L2C_CFG_L2M | L2C_CFG_SS_256;
- mtdcr(dcrbase_l2c + DCRN_L2C0_CFG, r);
-
- mtdcr(dcrbase_l2c + DCRN_L2C0_ADDR, 0);
-
- /* Hardware Clear Command */
- mtdcr(dcrbase_l2c + DCRN_L2C0_CMD, L2C_CMD_HCC);
- while (!(mfdcr(dcrbase_l2c + DCRN_L2C0_SR) & L2C_SR_CC))
- ;
-
- /* Clear Cache Parity and Tag Errors */
- mtdcr(dcrbase_l2c + DCRN_L2C0_CMD, L2C_CMD_CCP | L2C_CMD_CTE);
-
- /* Enable 64G snoop region starting at 0 */
- r = mfdcr(dcrbase_l2c + DCRN_L2C0_SNP0) &
- ~(L2C_SNP_BA_MASK | L2C_SNP_SSR_MASK);
- r |= L2C_SNP_SSR_32G | L2C_SNP_ESR;
- mtdcr(dcrbase_l2c + DCRN_L2C0_SNP0, r);
-
- r = mfdcr(dcrbase_l2c + DCRN_L2C0_SNP1) &
- ~(L2C_SNP_BA_MASK | L2C_SNP_SSR_MASK);
- r |= 0x80000000 | L2C_SNP_SSR_32G | L2C_SNP_ESR;
- mtdcr(dcrbase_l2c + DCRN_L2C0_SNP1, r);
-
- asm volatile ("sync" ::: "memory");
-
- /* Enable ICU/DCU ports */
- r = mfdcr(dcrbase_l2c + DCRN_L2C0_CFG);
- r &= ~(L2C_CFG_DCW_MASK | L2C_CFG_PMUX_MASK | L2C_CFG_PMIM
- | L2C_CFG_TPEI | L2C_CFG_CPEI | L2C_CFG_NAM | L2C_CFG_NBRM);
- r |= L2C_CFG_ICU | L2C_CFG_DCU | L2C_CFG_TPC | L2C_CFG_CPC | L2C_CFG_FRAN
- | L2C_CFG_CPIM | L2C_CFG_TPIM | L2C_CFG_LIM | L2C_CFG_SMCM;
-
- /* Check for 460EX/GT special handling */
- if (of_device_is_compatible(np, "ibm,l2-cache-460ex") ||
- of_device_is_compatible(np, "ibm,l2-cache-460gt"))
- r |= L2C_CFG_RDBW;
-
- mtdcr(dcrbase_l2c + DCRN_L2C0_CFG, r);
-
- asm volatile ("sync; isync" ::: "memory");
- local_irq_restore(flags);
-
- printk(KERN_INFO "%dk L2-cache enabled\n", l2_size >> 10);
-
- of_node_put(np);
- return 0;
-}
-arch_initcall(ppc4xx_l2c_probe);
-
-/*
- * Apply a system reset. Alternatively a board specific value may be
- * provided via the "reset-type" property in the cpu node.
- */
-void ppc4xx_reset_system(char *cmd)
-{
- struct device_node *np;
- u32 reset_type = DBCR0_RST_SYSTEM;
- const u32 *prop;
-
- np = of_find_node_by_type(NULL, "cpu");
- if (np) {
- prop = of_get_property(np, "reset-type", NULL);
-
- /*
- * Check if property exists and if it is in range:
- * 1 - PPC4xx core reset
- * 2 - PPC4xx chip reset
- * 3 - PPC4xx system reset (default)
- */
- if ((prop) && ((prop[0] >= 1) && (prop[0] <= 3)))
- reset_type = prop[0] << 28;
- }
-
- mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | reset_type);
-
- while (1)
- ; /* Just in case the reset doesn't work */
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 05:44:59 +0000