6ab3d5624e
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
565 lines
13 KiB
C
565 lines
13 KiB
C
/*
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* Common prep boot and setup code.
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*/
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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/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(unsigned long r3, unsigned long r4,
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unsigned long r5, unsigned long r6, unsigned long r7);
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extern void identify_cpu(unsigned long offset, unsigned long cpu);
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extern void do_cpu_ftr_fixups(unsigned long offset);
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extern void reloc_got2(unsigned long offset);
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extern void ppc6xx_idle(void);
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extern void power4_idle(void);
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extern 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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#ifdef CONFIG_PPC_PREP
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extern void prep_init(unsigned long r3, unsigned long r4,
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unsigned long r5, unsigned long r6, unsigned long r7);
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dev_t boot_dev;
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#endif /* CONFIG_PPC_PREP */
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int have_of;
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EXPORT_SYMBOL(have_of);
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#ifdef __DO_IRQ_CANON
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int ppc_do_canonicalize_irqs;
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EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
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#endif
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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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/*
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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_each_online_cpu(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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__init
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unsigned long
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early_init(int r3, int r4, int r5)
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{
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unsigned long phys;
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unsigned long offset = reloc_offset();
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/* Default */
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phys = offset + KERNELBASE;
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/* First zero the BSS -- use memset, some arches don't have
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* caches on yet */
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memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
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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 phys;
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}
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#ifdef CONFIG_PPC_PREP
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/*
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* The PPC_PREP version of platform_init...
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*/
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void __init
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platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7)
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{
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#ifdef CONFIG_BOOTX_TEXT
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if (boot_text_mapped) {
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btext_clearscreen();
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btext_welcome();
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}
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#endif
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parse_bootinfo(find_bootinfo());
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prep_init(r3, r4, r5, r6, r7);
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}
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#endif /* CONFIG_PPC_PREP */
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struct bi_record *find_bootinfo(void)
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{
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struct bi_record *rec;
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rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
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if ( rec->tag != BI_FIRST ) {
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/*
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* This 0x10000 offset is a terrible hack but it will go away when
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* we have the bootloader handle all the relocation and
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* prom calls -- Cort
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*/
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rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
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if ( rec->tag != BI_FIRST )
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return NULL;
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}
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return rec;
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}
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void parse_bootinfo(struct bi_record *rec)
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{
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if (rec == NULL || rec->tag != BI_FIRST)
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return;
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while (rec->tag != BI_LAST) {
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ulong *data = rec->data;
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switch (rec->tag) {
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case BI_CMD_LINE:
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strlcpy(cmd_line, (void *)data, sizeof(cmd_line));
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break;
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#ifdef CONFIG_BLK_DEV_INITRD
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case BI_INITRD:
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initrd_start = data[0] + KERNELBASE;
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initrd_end = data[0] + data[1] + KERNELBASE;
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break;
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#endif /* CONFIG_BLK_DEV_INITRD */
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case BI_MEMSIZE:
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boot_mem_size = data[0];
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break;
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}
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rec = (struct bi_record *)((ulong)rec + rec->size);
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}
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}
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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
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machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7)
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{
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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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platform_init(r3, r4, r5, r6, r7);
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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)
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{
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if (ppc_md.nvram_write_val)
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ppc_md.nvram_write_val(addr, val);
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}
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EXPORT_SYMBOL(nvram_write_byte);
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void nvram_sync(void)
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{
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if (ppc_md.nvram_sync)
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ppc_md.nvram_sync();
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}
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EXPORT_SYMBOL(nvram_sync);
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#endif /* CONFIG_NVRAM */
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static struct cpu cpu_devices[NR_CPUS];
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int __init ppc_init(void)
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{
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int i;
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/* clear the progress line */
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if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
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/* register CPU devices */
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for_each_possible_cpu(i)
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register_cpu(&cpu_devices[i], i);
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/* call platform init */
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if (ppc_md.init != NULL) {
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ppc_md.init();
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}
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return 0;
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}
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arch_initcall(ppc_init);
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/* Warning, IO base is not yet inited */
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void __init setup_arch(char **cmdline_p)
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{
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extern char *klimit;
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extern void do_init_bootmem(void);
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/* so udelay does something sensible, assume <= 1000 bogomips */
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loops_per_jiffy = 500000000 / HZ;
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if (ppc_md.init_early)
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ppc_md.init_early();
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#ifdef CONFIG_XMON
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xmon_init(1);
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if (strstr(cmd_line, "xmon"))
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xmon(NULL);
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#endif /* CONFIG_XMON */
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if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
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#if defined(CONFIG_KGDB)
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if (ppc_md.kgdb_map_scc)
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ppc_md.kgdb_map_scc();
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set_debug_traps();
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if (strstr(cmd_line, "gdb")) {
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if (ppc_md.progress)
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ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
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printk("kgdb breakpoint activated\n");
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breakpoint();
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}
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#endif
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/*
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* Set cache line size based on type of cpu as a default.
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* 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();
|
|
}
|