30cd4a4e9c
We were initializing the btext stuff from prom_init(), thus breaking the rule that all communication between prom_init() and the rest of the kernel has to be via the flattened device tree. This removes the btext initialization calls from prom_init() and initializes it instead after the device tree is unflattened. It would be nice to do it earlier, but that needs some more infrastructure to find the properties we need in the flattened device tree. Signed-off-by: Paul Mackerras <paulus@samba.org>
656 lines
14 KiB
C
656 lines
14 KiB
C
/*
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* Common prep/pmac/chrp boot and setup code.
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/sched.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/reboot.h>
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#include <linux/delay.h>
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#include <linux/initrd.h>
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#include <linux/ide.h>
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#include <linux/tty.h>
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#include <linux/bootmem.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/cpu.h>
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#include <linux/console.h>
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#include <asm/residual.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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#include <asm/processor.h>
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#include <asm/pgtable.h>
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#include <asm/bootinfo.h>
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#include <asm/setup.h>
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#include <asm/amigappc.h>
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#include <asm/smp.h>
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#include <asm/elf.h>
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#include <asm/cputable.h>
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#include <asm/bootx.h>
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#include <asm/btext.h>
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#include <asm/machdep.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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#include <asm/pmac_feature.h>
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#include <asm/sections.h>
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#include <asm/nvram.h>
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#include <asm/xmon.h>
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#include <asm/ocp.h>
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#define USES_PPC_SYS (defined(CONFIG_85xx) || defined(CONFIG_83xx) || \
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defined(CONFIG_MPC10X_BRIDGE) || defined(CONFIG_8260) || \
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defined(CONFIG_PPC_MPC52xx))
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#if USES_PPC_SYS
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#include <asm/ppc_sys.h>
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#endif
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#if defined CONFIG_KGDB
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#include <asm/kgdb.h>
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#endif
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extern void platform_init(void);
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extern void bootx_init(unsigned long r4, unsigned long phys);
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extern void ppc6xx_idle(void);
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extern void power4_idle(void);
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boot_infos_t *boot_infos;
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struct ide_machdep_calls ppc_ide_md;
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/* Used with the BI_MEMSIZE bootinfo parameter to store the memory
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size value reported by the boot loader. */
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unsigned long boot_mem_size;
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unsigned long ISA_DMA_THRESHOLD;
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unsigned int DMA_MODE_READ;
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unsigned int DMA_MODE_WRITE;
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int have_of = 1;
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#ifdef CONFIG_PPC_MULTIPLATFORM
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int _machine = 0;
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extern void prep_init(void);
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extern void pmac_init(void);
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extern void chrp_init(void);
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dev_t boot_dev;
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#endif /* CONFIG_PPC_MULTIPLATFORM */
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#ifdef CONFIG_MAGIC_SYSRQ
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unsigned long SYSRQ_KEY = 0x54;
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#endif /* CONFIG_MAGIC_SYSRQ */
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#ifdef CONFIG_VGA_CONSOLE
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unsigned long vgacon_remap_base;
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#endif
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struct machdep_calls ppc_md;
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EXPORT_SYMBOL(ppc_md);
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/*
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* These are used in binfmt_elf.c to put aux entries on the stack
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* for each elf executable being started.
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*/
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int dcache_bsize;
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int icache_bsize;
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int ucache_bsize;
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#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \
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defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA)
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struct screen_info screen_info = {
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0, 25, /* orig-x, orig-y */
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0, /* unused */
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0, /* orig-video-page */
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0, /* orig-video-mode */
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80, /* orig-video-cols */
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0,0,0, /* ega_ax, ega_bx, ega_cx */
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25, /* orig-video-lines */
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1, /* orig-video-isVGA */
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16 /* orig-video-points */
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};
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#endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */
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void machine_restart(char *cmd)
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{
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#ifdef CONFIG_NVRAM
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nvram_sync();
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#endif
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ppc_md.restart(cmd);
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}
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void machine_power_off(void)
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{
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#ifdef CONFIG_NVRAM
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nvram_sync();
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#endif
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ppc_md.power_off();
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}
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void machine_halt(void)
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{
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#ifdef CONFIG_NVRAM
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nvram_sync();
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#endif
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ppc_md.halt();
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}
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void (*pm_power_off)(void) = machine_power_off;
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#ifdef CONFIG_TAU
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extern u32 cpu_temp(unsigned long cpu);
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extern u32 cpu_temp_both(unsigned long cpu);
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#endif /* CONFIG_TAU */
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int show_cpuinfo(struct seq_file *m, void *v)
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{
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int i = (int) v - 1;
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int err = 0;
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unsigned int pvr;
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unsigned short maj, min;
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unsigned long lpj;
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if (i >= NR_CPUS) {
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/* Show summary information */
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#ifdef CONFIG_SMP
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unsigned long bogosum = 0;
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for (i = 0; i < NR_CPUS; ++i)
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if (cpu_online(i))
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bogosum += cpu_data[i].loops_per_jiffy;
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seq_printf(m, "total bogomips\t: %lu.%02lu\n",
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bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
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#endif /* CONFIG_SMP */
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if (ppc_md.show_cpuinfo != NULL)
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err = ppc_md.show_cpuinfo(m);
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return err;
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}
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#ifdef CONFIG_SMP
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if (!cpu_online(i))
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return 0;
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pvr = cpu_data[i].pvr;
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lpj = cpu_data[i].loops_per_jiffy;
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#else
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pvr = mfspr(SPRN_PVR);
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lpj = loops_per_jiffy;
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#endif
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seq_printf(m, "processor\t: %d\n", i);
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seq_printf(m, "cpu\t\t: ");
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if (cur_cpu_spec->pvr_mask)
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seq_printf(m, "%s", cur_cpu_spec->cpu_name);
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else
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seq_printf(m, "unknown (%08x)", pvr);
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#ifdef CONFIG_ALTIVEC
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if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
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seq_printf(m, ", altivec supported");
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#endif
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seq_printf(m, "\n");
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#ifdef CONFIG_TAU
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if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
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#ifdef CONFIG_TAU_AVERAGE
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/* more straightforward, but potentially misleading */
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seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
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cpu_temp(i));
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#else
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/* show the actual temp sensor range */
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u32 temp;
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temp = cpu_temp_both(i);
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seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
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temp & 0xff, temp >> 16);
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#endif
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}
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#endif /* CONFIG_TAU */
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if (ppc_md.show_percpuinfo != NULL) {
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err = ppc_md.show_percpuinfo(m, i);
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if (err)
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return err;
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}
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/* If we are a Freescale core do a simple check so
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* we dont have to keep adding cases in the future */
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if ((PVR_VER(pvr) & 0x8000) == 0x8000) {
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maj = PVR_MAJ(pvr);
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min = PVR_MIN(pvr);
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} else {
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switch (PVR_VER(pvr)) {
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case 0x0020: /* 403 family */
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maj = PVR_MAJ(pvr) + 1;
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min = PVR_MIN(pvr);
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break;
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case 0x1008: /* 740P/750P ?? */
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maj = ((pvr >> 8) & 0xFF) - 1;
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min = pvr & 0xFF;
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break;
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default:
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maj = (pvr >> 8) & 0xFF;
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min = pvr & 0xFF;
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break;
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}
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}
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seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
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maj, min, PVR_VER(pvr), PVR_REV(pvr));
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seq_printf(m, "bogomips\t: %lu.%02lu\n",
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lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
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#if USES_PPC_SYS
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if (cur_ppc_sys_spec->ppc_sys_name)
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seq_printf(m, "chipset\t\t: %s\n",
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cur_ppc_sys_spec->ppc_sys_name);
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#endif
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#ifdef CONFIG_SMP
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seq_printf(m, "\n");
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#endif
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return 0;
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}
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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int i = *pos;
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return i <= NR_CPUS? (void *) (i + 1): NULL;
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}
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static void *c_next(struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return c_start(m, pos);
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}
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static void c_stop(struct seq_file *m, void *v)
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{
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}
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struct seq_operations cpuinfo_op = {
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.start =c_start,
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.next = c_next,
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.stop = c_stop,
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.show = show_cpuinfo,
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};
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/*
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* We're called here very early in the boot. We determine the machine
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* type and call the appropriate low-level setup functions.
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* -- Cort <cort@fsmlabs.com>
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*
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* Note that the kernel may be running at an address which is different
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* from the address that it was linked at, so we must use RELOC/PTRRELOC
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* to access static data (including strings). -- paulus
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*/
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unsigned long __init early_init(unsigned long dt_ptr)
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{
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unsigned long offset = reloc_offset();
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/*
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* Identify the CPU type and fix up code sections
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* that depend on which cpu we have.
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*/
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identify_cpu(offset, 0);
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do_cpu_ftr_fixups(offset);
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return KERNELBASE + offset;
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}
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#ifdef CONFIG_PPC_OF
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/*
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* Assume here that all clock rates are the same in a
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* smp system. -- Cort
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*/
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int
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of_show_percpuinfo(struct seq_file *m, int i)
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{
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struct device_node *cpu_node;
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u32 *fp;
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int s;
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cpu_node = find_type_devices("cpu");
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if (!cpu_node)
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return 0;
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for (s = 0; s < i && cpu_node->next; s++)
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cpu_node = cpu_node->next;
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fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL);
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if (fp)
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seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
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return 0;
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}
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void __init
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intuit_machine_type(void)
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{
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char *model;
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struct device_node *root;
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/* ask the OF info if we're a chrp or pmac */
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root = find_path_device("/");
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if (root != 0) {
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/* assume pmac unless proven to be chrp -- Cort */
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_machine = _MACH_Pmac;
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model = get_property(root, "device_type", NULL);
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if (model && !strncmp("chrp", model, 4))
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_machine = _MACH_chrp;
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else {
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model = get_property(root, "model", NULL);
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if (model && !strncmp(model, "IBM", 3))
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_machine = _MACH_chrp;
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}
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}
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}
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#endif
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#ifdef CONFIG_PPC_MULTIPLATFORM
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/*
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* The PPC_MULTIPLATFORM version of platform_init...
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*/
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void __init platform_init(void)
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{
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/* if we didn't get any bootinfo telling us what we are... */
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if (_machine == 0) {
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/* prep boot loader tells us if we're prep or not */
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if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
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_machine = _MACH_prep;
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}
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#ifdef CONFIG_PPC_PREP
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/* not much more to do here, if prep */
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if (_machine == _MACH_prep) {
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prep_init();
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return;
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}
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#endif
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#ifdef CONFIG_ADB
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if (strstr(cmd_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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switch (_machine) {
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#ifdef CONFIG_PPC_PMAC
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case _MACH_Pmac:
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pmac_init();
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break;
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#endif
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#ifdef CONFIG_PPC_CHRP
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case _MACH_chrp:
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chrp_init();
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break;
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#endif
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}
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}
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#ifdef CONFIG_SERIAL_CORE_CONSOLE
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extern char *of_stdout_device;
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static int __init set_preferred_console(void)
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{
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struct device_node *prom_stdout;
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char *name;
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int offset = 0;
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if (of_stdout_device == NULL)
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return -ENODEV;
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/* The user has requested a console so this is already set up. */
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if (strstr(saved_command_line, "console="))
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return -EBUSY;
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prom_stdout = find_path_device(of_stdout_device);
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if (!prom_stdout)
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return -ENODEV;
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name = (char *)get_property(prom_stdout, "name", NULL);
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if (!name)
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return -ENODEV;
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if (strcmp(name, "serial") == 0) {
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int i;
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u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
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if (i > 8) {
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switch (reg[1]) {
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case 0x3f8:
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offset = 0;
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break;
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case 0x2f8:
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offset = 1;
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break;
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case 0x898:
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offset = 2;
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break;
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case 0x890:
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offset = 3;
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break;
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default:
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/* We dont recognise the serial port */
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return -ENODEV;
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}
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}
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} else if (strcmp(name, "ch-a") == 0)
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offset = 0;
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else if (strcmp(name, "ch-b") == 0)
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offset = 1;
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else
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return -ENODEV;
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return add_preferred_console("ttyS", offset, NULL);
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}
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console_initcall(set_preferred_console);
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#endif /* CONFIG_SERIAL_CORE_CONSOLE */
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#endif /* CONFIG_PPC_MULTIPLATFORM */
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/*
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* Find out what kind of machine we're on and save any data we need
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* from the early boot process (devtree is copied on pmac by prom_init()).
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* This is called very early on the boot process, after a minimal
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* MMU environment has been set up but before MMU_init is called.
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*/
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void __init machine_init(unsigned long dt_ptr, unsigned long phys)
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{
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early_init_devtree(__va(dt_ptr));
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#ifdef CONFIG_CMDLINE
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strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
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#endif /* CONFIG_CMDLINE */
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#ifdef CONFIG_6xx
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ppc_md.power_save = ppc6xx_idle;
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#endif
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#ifdef CONFIG_POWER4
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ppc_md.power_save = power4_idle;
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#endif
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platform_init();
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if (ppc_md.progress)
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ppc_md.progress("id mach(): done", 0x200);
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}
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#ifdef CONFIG_BOOKE_WDT
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/* Checks wdt=x and wdt_period=xx command-line option */
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int __init early_parse_wdt(char *p)
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{
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if (p && strncmp(p, "0", 1) != 0)
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booke_wdt_enabled = 1;
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return 0;
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}
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early_param("wdt", early_parse_wdt);
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int __init early_parse_wdt_period (char *p)
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{
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if (p)
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booke_wdt_period = simple_strtoul(p, NULL, 0);
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return 0;
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}
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early_param("wdt_period", early_parse_wdt_period);
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#endif /* CONFIG_BOOKE_WDT */
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/* Checks "l2cr=xxxx" command-line option */
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int __init ppc_setup_l2cr(char *str)
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{
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if (cpu_has_feature(CPU_FTR_L2CR)) {
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unsigned long val = simple_strtoul(str, NULL, 0);
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printk(KERN_INFO "l2cr set to %lx\n", val);
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_set_L2CR(0); /* force invalidate by disable cache */
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_set_L2CR(val); /* and enable it */
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}
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return 1;
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}
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__setup("l2cr=", ppc_setup_l2cr);
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#ifdef CONFIG_GENERIC_NVRAM
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/* Generic nvram hooks used by drivers/char/gen_nvram.c */
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unsigned char nvram_read_byte(int addr)
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{
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if (ppc_md.nvram_read_val)
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return ppc_md.nvram_read_val(addr);
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return 0xff;
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}
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EXPORT_SYMBOL(nvram_read_byte);
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void nvram_write_byte(unsigned char val, int addr)
|
|
{
|
|
if (ppc_md.nvram_write_val)
|
|
ppc_md.nvram_write_val(addr, val);
|
|
}
|
|
EXPORT_SYMBOL(nvram_write_byte);
|
|
|
|
void nvram_sync(void)
|
|
{
|
|
if (ppc_md.nvram_sync)
|
|
ppc_md.nvram_sync();
|
|
}
|
|
EXPORT_SYMBOL(nvram_sync);
|
|
|
|
#endif /* CONFIG_NVRAM */
|
|
|
|
static struct cpu cpu_devices[NR_CPUS];
|
|
|
|
int __init ppc_init(void)
|
|
{
|
|
int i;
|
|
|
|
/* clear the progress line */
|
|
if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
|
|
|
|
/* register CPU devices */
|
|
for (i = 0; i < NR_CPUS; i++)
|
|
if (cpu_possible(i))
|
|
register_cpu(&cpu_devices[i], i, NULL);
|
|
|
|
/* call platform init */
|
|
if (ppc_md.init != NULL) {
|
|
ppc_md.init();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
arch_initcall(ppc_init);
|
|
|
|
/* Warning, IO base is not yet inited */
|
|
void __init setup_arch(char **cmdline_p)
|
|
{
|
|
extern char *klimit;
|
|
extern void do_init_bootmem(void);
|
|
|
|
/* so udelay does something sensible, assume <= 1000 bogomips */
|
|
loops_per_jiffy = 500000000 / HZ;
|
|
|
|
unflatten_device_tree();
|
|
finish_device_tree();
|
|
|
|
#ifdef CONFIG_BOOTX_TEXT
|
|
init_boot_display();
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_MULTIPLATFORM
|
|
/* This could be called "early setup arch", it must be done
|
|
* now because xmon need it
|
|
*/
|
|
if (_machine == _MACH_Pmac)
|
|
pmac_feature_init(); /* New cool way */
|
|
#endif
|
|
|
|
#ifdef CONFIG_XMON
|
|
xmon_map_scc();
|
|
if (strstr(cmd_line, "xmon"))
|
|
xmon(NULL);
|
|
#endif /* CONFIG_XMON */
|
|
if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
|
|
|
|
#if defined(CONFIG_KGDB)
|
|
if (ppc_md.kgdb_map_scc)
|
|
ppc_md.kgdb_map_scc();
|
|
set_debug_traps();
|
|
if (strstr(cmd_line, "gdb")) {
|
|
if (ppc_md.progress)
|
|
ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
|
|
printk("kgdb breakpoint activated\n");
|
|
breakpoint();
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Set cache line size based on type of cpu as a default.
|
|
* Systems with OF can look in the properties on the cpu node(s)
|
|
* for a possibly more accurate value.
|
|
*/
|
|
if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) {
|
|
dcache_bsize = cur_cpu_spec->dcache_bsize;
|
|
icache_bsize = cur_cpu_spec->icache_bsize;
|
|
ucache_bsize = 0;
|
|
} else
|
|
ucache_bsize = dcache_bsize = icache_bsize
|
|
= cur_cpu_spec->dcache_bsize;
|
|
|
|
/* reboot on panic */
|
|
panic_timeout = 180;
|
|
|
|
init_mm.start_code = PAGE_OFFSET;
|
|
init_mm.end_code = (unsigned long) _etext;
|
|
init_mm.end_data = (unsigned long) _edata;
|
|
init_mm.brk = (unsigned long) klimit;
|
|
|
|
/* Save unparsed command line copy for /proc/cmdline */
|
|
strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
|
|
*cmdline_p = cmd_line;
|
|
|
|
parse_early_param();
|
|
|
|
/* set up the bootmem stuff with available memory */
|
|
do_init_bootmem();
|
|
if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
|
|
|
|
#ifdef CONFIG_PPC_OCP
|
|
/* Initialize OCP device list */
|
|
ocp_early_init();
|
|
if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
|
|
#endif
|
|
|
|
#ifdef CONFIG_DUMMY_CONSOLE
|
|
conswitchp = &dummy_con;
|
|
#endif
|
|
|
|
ppc_md.setup_arch();
|
|
if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
|
|
|
|
paging_init();
|
|
|
|
/* this is for modules since _machine can be a define -- Cort */
|
|
ppc_md.ppc_machine = _machine;
|
|
}
|