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622 lines
14 KiB
622 lines
14 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Powermac setup and early boot code plus other random bits. |
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* |
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* PowerPC version |
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* Copyright (C) 1995-1996 Gary Thomas ([email protected]) |
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* |
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* Adapted for Power Macintosh by Paul Mackerras |
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* Copyright (C) 1996 Paul Mackerras ([email protected]) |
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* |
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* Derived from "arch/alpha/kernel/setup.c" |
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* Copyright (C) 1995 Linus Torvalds |
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* |
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* Maintained by Benjamin Herrenschmidt ([email protected]) |
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*/ |
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|
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/* |
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* bootup setup stuff.. |
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*/ |
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|
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#include <linux/init.h> |
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#include <linux/errno.h> |
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#include <linux/sched.h> |
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#include <linux/kernel.h> |
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#include <linux/mm.h> |
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#include <linux/stddef.h> |
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#include <linux/unistd.h> |
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#include <linux/ptrace.h> |
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#include <linux/export.h> |
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#include <linux/user.h> |
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#include <linux/tty.h> |
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#include <linux/string.h> |
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#include <linux/delay.h> |
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#include <linux/ioport.h> |
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#include <linux/major.h> |
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#include <linux/initrd.h> |
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#include <linux/vt_kern.h> |
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#include <linux/console.h> |
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#include <linux/pci.h> |
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#include <linux/adb.h> |
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#include <linux/cuda.h> |
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#include <linux/pmu.h> |
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#include <linux/irq.h> |
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#include <linux/seq_file.h> |
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#include <linux/root_dev.h> |
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#include <linux/bitops.h> |
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#include <linux/suspend.h> |
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#include <linux/of_device.h> |
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#include <linux/of_platform.h> |
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|
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#include <asm/reg.h> |
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#include <asm/sections.h> |
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#include <asm/prom.h> |
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#include <asm/io.h> |
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#include <asm/pci-bridge.h> |
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#include <asm/ohare.h> |
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#include <asm/mediabay.h> |
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#include <asm/machdep.h> |
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#include <asm/dma.h> |
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#include <asm/cputable.h> |
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#include <asm/btext.h> |
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#include <asm/pmac_feature.h> |
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#include <asm/time.h> |
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#include <asm/mmu_context.h> |
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#include <asm/iommu.h> |
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#include <asm/smu.h> |
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#include <asm/pmc.h> |
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#include <asm/udbg.h> |
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#include "pmac.h" |
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#undef SHOW_GATWICK_IRQS |
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int ppc_override_l2cr = 0; |
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int ppc_override_l2cr_value; |
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int has_l2cache = 0; |
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int pmac_newworld; |
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static int current_root_goodness = -1; |
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extern struct machdep_calls pmac_md; |
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#define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */ |
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#ifdef CONFIG_PPC64 |
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int sccdbg; |
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#endif |
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sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN; |
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EXPORT_SYMBOL(sys_ctrler); |
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static void pmac_show_cpuinfo(struct seq_file *m) |
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{ |
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struct device_node *np; |
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const char *pp; |
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int plen; |
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int mbmodel; |
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unsigned int mbflags; |
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char* mbname; |
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mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, |
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PMAC_MB_INFO_MODEL, 0); |
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mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, |
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PMAC_MB_INFO_FLAGS, 0); |
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if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME, |
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(long) &mbname) != 0) |
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mbname = "Unknown"; |
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/* find motherboard type */ |
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seq_printf(m, "machine\t\t: "); |
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np = of_find_node_by_path("/"); |
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if (np != NULL) { |
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pp = of_get_property(np, "model", NULL); |
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if (pp != NULL) |
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seq_printf(m, "%s\n", pp); |
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else |
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seq_printf(m, "PowerMac\n"); |
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pp = of_get_property(np, "compatible", &plen); |
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if (pp != NULL) { |
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seq_printf(m, "motherboard\t:"); |
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while (plen > 0) { |
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int l = strlen(pp) + 1; |
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seq_printf(m, " %s", pp); |
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plen -= l; |
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pp += l; |
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} |
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seq_printf(m, "\n"); |
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} |
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of_node_put(np); |
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} else |
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seq_printf(m, "PowerMac\n"); |
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|
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/* print parsed model */ |
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seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname); |
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seq_printf(m, "pmac flags\t: %08x\n", mbflags); |
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/* find l2 cache info */ |
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np = of_find_node_by_name(NULL, "l2-cache"); |
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if (np == NULL) |
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np = of_find_node_by_type(NULL, "cache"); |
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if (np != NULL) { |
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const unsigned int *ic = |
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of_get_property(np, "i-cache-size", NULL); |
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const unsigned int *dc = |
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of_get_property(np, "d-cache-size", NULL); |
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seq_printf(m, "L2 cache\t:"); |
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has_l2cache = 1; |
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if (of_get_property(np, "cache-unified", NULL) && dc) { |
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seq_printf(m, " %dK unified", *dc / 1024); |
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} else { |
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if (ic) |
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seq_printf(m, " %dK instruction", *ic / 1024); |
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if (dc) |
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seq_printf(m, "%s %dK data", |
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(ic? " +": ""), *dc / 1024); |
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} |
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pp = of_get_property(np, "ram-type", NULL); |
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if (pp) |
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seq_printf(m, " %s", pp); |
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seq_printf(m, "\n"); |
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of_node_put(np); |
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} |
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/* Indicate newworld/oldworld */ |
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seq_printf(m, "pmac-generation\t: %s\n", |
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pmac_newworld ? "NewWorld" : "OldWorld"); |
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} |
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#ifndef CONFIG_ADB_CUDA |
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int find_via_cuda(void) |
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{ |
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struct device_node *dn = of_find_node_by_name(NULL, "via-cuda"); |
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if (!dn) |
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return 0; |
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of_node_put(dn); |
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printk("WARNING ! Your machine is CUDA-based but your kernel\n"); |
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printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n"); |
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return 0; |
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} |
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#endif |
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#ifndef CONFIG_ADB_PMU |
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int find_via_pmu(void) |
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{ |
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struct device_node *dn = of_find_node_by_name(NULL, "via-pmu"); |
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if (!dn) |
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return 0; |
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of_node_put(dn); |
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printk("WARNING ! Your machine is PMU-based but your kernel\n"); |
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printk(" wasn't compiled with CONFIG_ADB_PMU option !\n"); |
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return 0; |
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} |
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#endif |
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#ifndef CONFIG_PMAC_SMU |
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int smu_init(void) |
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{ |
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/* should check and warn if SMU is present */ |
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return 0; |
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} |
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#endif |
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#ifdef CONFIG_PPC32 |
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static volatile u32 *sysctrl_regs; |
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static void __init ohare_init(void) |
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{ |
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struct device_node *dn; |
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/* this area has the CPU identification register |
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and some registers used by smp boards */ |
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sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000); |
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/* |
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* Turn on the L2 cache. |
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* We assume that we have a PSX memory controller iff |
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* we have an ohare I/O controller. |
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*/ |
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dn = of_find_node_by_name(NULL, "ohare"); |
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if (dn) { |
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of_node_put(dn); |
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if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) { |
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if (sysctrl_regs[4] & 0x10) |
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sysctrl_regs[4] |= 0x04000020; |
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else |
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sysctrl_regs[4] |= 0x04000000; |
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if(has_l2cache) |
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printk(KERN_INFO "Level 2 cache enabled\n"); |
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} |
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} |
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} |
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static void __init l2cr_init(void) |
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{ |
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/* Checks "l2cr-value" property in the registry */ |
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if (cpu_has_feature(CPU_FTR_L2CR)) { |
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struct device_node *np; |
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for_each_of_cpu_node(np) { |
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const unsigned int *l2cr = |
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of_get_property(np, "l2cr-value", NULL); |
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if (l2cr) { |
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ppc_override_l2cr = 1; |
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ppc_override_l2cr_value = *l2cr; |
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_set_L2CR(0); |
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_set_L2CR(ppc_override_l2cr_value); |
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} |
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of_node_put(np); |
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break; |
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} |
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} |
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if (ppc_override_l2cr) |
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printk(KERN_INFO "L2CR overridden (0x%x), " |
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"backside cache is %s\n", |
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ppc_override_l2cr_value, |
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(ppc_override_l2cr_value & 0x80000000) |
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? "enabled" : "disabled"); |
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} |
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#endif |
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static void __init pmac_setup_arch(void) |
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{ |
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struct device_node *cpu, *ic; |
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const int *fp; |
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unsigned long pvr; |
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pvr = PVR_VER(mfspr(SPRN_PVR)); |
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/* Set loops_per_jiffy to a half-way reasonable value, |
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for use until calibrate_delay gets called. */ |
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loops_per_jiffy = 50000000 / HZ; |
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for_each_of_cpu_node(cpu) { |
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fp = of_get_property(cpu, "clock-frequency", NULL); |
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if (fp != NULL) { |
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if (pvr >= 0x30 && pvr < 0x80) |
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/* PPC970 etc. */ |
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loops_per_jiffy = *fp / (3 * HZ); |
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else if (pvr == 4 || pvr >= 8) |
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/* 604, G3, G4 etc. */ |
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loops_per_jiffy = *fp / HZ; |
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else |
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/* 603, etc. */ |
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loops_per_jiffy = *fp / (2 * HZ); |
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of_node_put(cpu); |
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break; |
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} |
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} |
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/* See if newworld or oldworld */ |
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ic = of_find_node_with_property(NULL, "interrupt-controller"); |
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if (ic) { |
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pmac_newworld = 1; |
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of_node_put(ic); |
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} |
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#ifdef CONFIG_PPC32 |
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ohare_init(); |
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l2cr_init(); |
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#endif /* CONFIG_PPC32 */ |
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find_via_cuda(); |
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find_via_pmu(); |
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smu_init(); |
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#if IS_ENABLED(CONFIG_NVRAM) |
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pmac_nvram_init(); |
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#endif |
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#ifdef CONFIG_PPC32 |
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#ifdef CONFIG_BLK_DEV_INITRD |
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if (initrd_start) |
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ROOT_DEV = Root_RAM0; |
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else |
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#endif |
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ROOT_DEV = DEFAULT_ROOT_DEVICE; |
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#endif |
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#ifdef CONFIG_ADB |
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if (strstr(boot_command_line, "adb_sync")) { |
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extern int __adb_probe_sync; |
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__adb_probe_sync = 1; |
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} |
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#endif /* CONFIG_ADB */ |
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} |
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#ifdef CONFIG_SCSI |
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void note_scsi_host(struct device_node *node, void *host) |
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{ |
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} |
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EXPORT_SYMBOL(note_scsi_host); |
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#endif |
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static int initializing = 1; |
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static int pmac_late_init(void) |
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{ |
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initializing = 0; |
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return 0; |
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} |
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machine_late_initcall(powermac, pmac_late_init); |
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void note_bootable_part(dev_t dev, int part, int goodness); |
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/* |
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* This is __ref because we check for "initializing" before |
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* touching any of the __init sensitive things and "initializing" |
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* will be false after __init time. This can't be __init because it |
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* can be called whenever a disk is first accessed. |
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*/ |
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void __ref note_bootable_part(dev_t dev, int part, int goodness) |
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{ |
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char *p; |
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if (!initializing) |
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return; |
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if ((goodness <= current_root_goodness) && |
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ROOT_DEV != DEFAULT_ROOT_DEVICE) |
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return; |
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p = strstr(boot_command_line, "root="); |
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if (p != NULL && (p == boot_command_line || p[-1] == ' ')) |
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return; |
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ROOT_DEV = dev + part; |
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current_root_goodness = goodness; |
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} |
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#ifdef CONFIG_ADB_CUDA |
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static void __noreturn cuda_restart(void) |
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{ |
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struct adb_request req; |
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cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM); |
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for (;;) |
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cuda_poll(); |
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} |
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static void __noreturn cuda_shutdown(void) |
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{ |
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struct adb_request req; |
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cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN); |
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for (;;) |
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cuda_poll(); |
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} |
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#else |
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#define cuda_restart() |
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#define cuda_shutdown() |
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#endif |
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#ifndef CONFIG_ADB_PMU |
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#define pmu_restart() |
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#define pmu_shutdown() |
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#endif |
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#ifndef CONFIG_PMAC_SMU |
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#define smu_restart() |
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#define smu_shutdown() |
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#endif |
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static void __noreturn pmac_restart(char *cmd) |
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{ |
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switch (sys_ctrler) { |
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case SYS_CTRLER_CUDA: |
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cuda_restart(); |
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break; |
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case SYS_CTRLER_PMU: |
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pmu_restart(); |
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break; |
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case SYS_CTRLER_SMU: |
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smu_restart(); |
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break; |
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default: ; |
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} |
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while (1) ; |
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} |
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static void __noreturn pmac_power_off(void) |
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{ |
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switch (sys_ctrler) { |
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case SYS_CTRLER_CUDA: |
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cuda_shutdown(); |
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break; |
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case SYS_CTRLER_PMU: |
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pmu_shutdown(); |
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break; |
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case SYS_CTRLER_SMU: |
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smu_shutdown(); |
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break; |
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default: ; |
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} |
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while (1) ; |
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} |
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static void __noreturn |
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pmac_halt(void) |
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{ |
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pmac_power_off(); |
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} |
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/* |
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* Early initialization. |
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*/ |
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static void __init pmac_init(void) |
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{ |
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/* Enable early btext debug if requested */ |
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if (strstr(boot_command_line, "btextdbg")) { |
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udbg_adb_init_early(); |
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register_early_udbg_console(); |
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} |
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/* Probe motherboard chipset */ |
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pmac_feature_init(); |
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/* Initialize debug stuff */ |
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udbg_scc_init(!!strstr(boot_command_line, "sccdbg")); |
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udbg_adb_init(!!strstr(boot_command_line, "btextdbg")); |
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#ifdef CONFIG_PPC64 |
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iommu_init_early_dart(&pmac_pci_controller_ops); |
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#endif |
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/* SMP Init has to be done early as we need to patch up |
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* cpu_possible_mask before interrupt stacks are allocated |
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* or kaboom... |
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*/ |
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#ifdef CONFIG_SMP |
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pmac_setup_smp(); |
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#endif |
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} |
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static int __init pmac_declare_of_platform_devices(void) |
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{ |
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struct device_node *np; |
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np = of_find_node_by_name(NULL, "valkyrie"); |
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if (np) { |
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of_platform_device_create(np, "valkyrie", NULL); |
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of_node_put(np); |
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} |
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np = of_find_node_by_name(NULL, "platinum"); |
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if (np) { |
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of_platform_device_create(np, "platinum", NULL); |
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of_node_put(np); |
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} |
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np = of_find_node_by_type(NULL, "smu"); |
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if (np) { |
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of_platform_device_create(np, "smu", NULL); |
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of_node_put(np); |
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} |
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np = of_find_node_by_type(NULL, "fcu"); |
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if (np == NULL) { |
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/* Some machines have strangely broken device-tree */ |
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np = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/fan@15e"); |
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} |
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if (np) { |
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of_platform_device_create(np, "temperature", NULL); |
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of_node_put(np); |
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} |
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return 0; |
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} |
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machine_device_initcall(powermac, pmac_declare_of_platform_devices); |
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|
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#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE |
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/* |
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* This is called very early, as part of console_init() (typically just after |
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* time_init()). This function is respondible for trying to find a good |
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* default console on serial ports. It tries to match the open firmware |
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* default output with one of the available serial console drivers. |
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*/ |
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static int __init check_pmac_serial_console(void) |
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{ |
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struct device_node *prom_stdout = NULL; |
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int offset = 0; |
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const char *name; |
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#ifdef CONFIG_SERIAL_PMACZILOG_TTYS |
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char *devname = "ttyS"; |
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#else |
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char *devname = "ttyPZ"; |
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#endif |
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pr_debug(" -> check_pmac_serial_console()\n"); |
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|
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/* The user has requested a console so this is already set up. */ |
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if (strstr(boot_command_line, "console=")) { |
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pr_debug(" console was specified !\n"); |
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return -EBUSY; |
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} |
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|
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if (!of_chosen) { |
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pr_debug(" of_chosen is NULL !\n"); |
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return -ENODEV; |
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} |
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|
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/* We are getting a weird phandle from OF ... */ |
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/* ... So use the full path instead */ |
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name = of_get_property(of_chosen, "linux,stdout-path", NULL); |
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if (name == NULL) { |
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pr_debug(" no linux,stdout-path !\n"); |
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return -ENODEV; |
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} |
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prom_stdout = of_find_node_by_path(name); |
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if (!prom_stdout) { |
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pr_debug(" can't find stdout package %s !\n", name); |
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return -ENODEV; |
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} |
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pr_debug("stdout is %pOF\n", prom_stdout); |
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if (of_node_name_eq(prom_stdout, "ch-a")) |
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offset = 0; |
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else if (of_node_name_eq(prom_stdout, "ch-b")) |
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offset = 1; |
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else |
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goto not_found; |
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of_node_put(prom_stdout); |
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pr_debug("Found serial console at %s%d\n", devname, offset); |
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|
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return add_preferred_console(devname, offset, NULL); |
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not_found: |
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pr_debug("No preferred console found !\n"); |
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of_node_put(prom_stdout); |
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return -ENODEV; |
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} |
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console_initcall(check_pmac_serial_console); |
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|
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#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ |
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|
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/* |
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* Called very early, MMU is off, device-tree isn't unflattened |
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*/ |
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static int __init pmac_probe(void) |
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{ |
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if (!of_machine_is_compatible("Power Macintosh") && |
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!of_machine_is_compatible("MacRISC")) |
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return 0; |
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|
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#ifdef CONFIG_PPC32 |
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/* isa_io_base gets set in pmac_pci_init */ |
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DMA_MODE_READ = 1; |
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DMA_MODE_WRITE = 2; |
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#endif /* CONFIG_PPC32 */ |
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pm_power_off = pmac_power_off; |
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|
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pmac_init(); |
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return 1; |
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} |
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define_machine(powermac) { |
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.name = "PowerMac", |
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.probe = pmac_probe, |
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.setup_arch = pmac_setup_arch, |
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.discover_phbs = pmac_pci_init, |
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.show_cpuinfo = pmac_show_cpuinfo, |
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.init_IRQ = pmac_pic_init, |
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.get_irq = NULL, /* changed later */ |
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.pci_irq_fixup = pmac_pci_irq_fixup, |
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.restart = pmac_restart, |
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.halt = pmac_halt, |
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.time_init = pmac_time_init, |
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.get_boot_time = pmac_get_boot_time, |
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.set_rtc_time = pmac_set_rtc_time, |
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.get_rtc_time = pmac_get_rtc_time, |
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.calibrate_decr = pmac_calibrate_decr, |
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.feature_call = pmac_do_feature_call, |
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.progress = udbg_progress, |
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#ifdef CONFIG_PPC64 |
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.power_save = power4_idle, |
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.enable_pmcs = power4_enable_pmcs, |
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#endif /* CONFIG_PPC64 */ |
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#ifdef CONFIG_PPC32 |
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.pcibios_after_init = pmac_pcibios_after_init, |
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.phys_mem_access_prot = pci_phys_mem_access_prot, |
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#endif |
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};
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