150 lines
3.1 KiB
C
150 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* misc setup functions for MPC83xx
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*
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* Maintainer: Kumar Gala <galak@kernel.crashing.org>
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*/
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/of_platform.h>
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#include <linux/pci.h>
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#include <asm/debug.h>
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#include <asm/io.h>
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#include <asm/hw_irq.h>
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#include <asm/ipic.h>
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#include <sysdev/fsl_soc.h>
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#include <sysdev/fsl_pci.h>
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#include <mm/mmu_decl.h>
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#include "mpc83xx.h"
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static __be32 __iomem *restart_reg_base;
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static int __init mpc83xx_restart_init(void)
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{
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/* map reset restart_reg_baseister space */
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restart_reg_base = ioremap(get_immrbase() + 0x900, 0xff);
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return 0;
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}
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arch_initcall(mpc83xx_restart_init);
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void __noreturn mpc83xx_restart(char *cmd)
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{
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#define RST_OFFSET 0x00000900
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#define RST_PROT_REG 0x00000018
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#define RST_CTRL_REG 0x0000001c
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local_irq_disable();
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if (restart_reg_base) {
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/* enable software reset "RSTE" */
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out_be32(restart_reg_base + (RST_PROT_REG >> 2), 0x52535445);
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/* set software hard reset */
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out_be32(restart_reg_base + (RST_CTRL_REG >> 2), 0x2);
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} else {
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printk (KERN_EMERG "Error: Restart registers not mapped, spinning!\n");
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}
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for (;;) ;
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}
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long __init mpc83xx_time_init(void)
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{
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#define SPCR_OFFSET 0x00000110
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#define SPCR_TBEN 0x00400000
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__be32 __iomem *spcr = ioremap(get_immrbase() + SPCR_OFFSET, 4);
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__be32 tmp;
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tmp = in_be32(spcr);
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out_be32(spcr, tmp | SPCR_TBEN);
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iounmap(spcr);
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return 0;
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}
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void __init mpc83xx_ipic_init_IRQ(void)
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{
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struct device_node *np;
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/* looking for fsl,pq2pro-pic which is asl compatible with fsl,ipic */
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np = of_find_compatible_node(NULL, NULL, "fsl,ipic");
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if (!np)
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np = of_find_node_by_type(NULL, "ipic");
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if (!np)
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return;
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ipic_init(np, 0);
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of_node_put(np);
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/* Initialize the default interrupt mapping priorities,
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* in case the boot rom changed something on us.
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*/
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ipic_set_default_priority();
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}
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static const struct of_device_id of_bus_ids[] __initconst = {
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{ .type = "soc", },
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{ .compatible = "soc", },
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{ .compatible = "simple-bus" },
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{ .compatible = "gianfar" },
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{ .compatible = "gpio-leds", },
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{ .type = "qe", },
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{ .compatible = "fsl,qe", },
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{},
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};
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int __init mpc83xx_declare_of_platform_devices(void)
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{
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of_platform_bus_probe(NULL, of_bus_ids, NULL);
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return 0;
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}
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#ifdef CONFIG_PCI
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void __init mpc83xx_setup_pci(void)
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{
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struct device_node *np;
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for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
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mpc83xx_add_bridge(np);
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for_each_compatible_node(np, "pci", "fsl,mpc8314-pcie")
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mpc83xx_add_bridge(np);
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}
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#endif
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void __init mpc83xx_setup_arch(void)
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{
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phys_addr_t immrbase = get_immrbase();
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int immrsize = IS_ALIGNED(immrbase, SZ_2M) ? SZ_2M : SZ_1M;
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unsigned long va = fix_to_virt(FIX_IMMR_BASE);
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if (ppc_md.progress)
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ppc_md.progress("mpc83xx_setup_arch()", 0);
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setbat(-1, va, immrbase, immrsize, PAGE_KERNEL_NCG);
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update_bats();
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}
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int machine_check_83xx(struct pt_regs *regs)
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{
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u32 mask = 1 << (31 - IPIC_MCP_WDT);
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if (!(regs->msr & SRR1_MCE_MCP) || !(ipic_get_mcp_status() & mask))
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return machine_check_generic(regs);
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ipic_clear_mcp_status(mask);
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if (debugger_fault_handler(regs))
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return 1;
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die("Watchdog NMI Reset", regs, 0);
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return 1;
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}
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