1 files changed, 125 insertions, 168 deletions

diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index db72a92943b..ea4fda60e57 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -2,7 +2,6 @@
  * Common prep/pmac/chrp boot and setup code.
  */
 
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/string.h>
 #include <linux/sched.h>
@@ -11,21 +10,19 @@
 #include <linux/reboot.h>
 #include <linux/delay.h>
 #include <linux/initrd.h>
-#include <linux/ide.h>
 #include <linux/tty.h>
 #include <linux/bootmem.h>
 #include <linux/seq_file.h>
 #include <linux/root_dev.h>
 #include <linux/cpu.h>
 #include <linux/console.h>
+#include <linux/memblock.h>
 
-#include <asm/residual.h>
 #include <asm/io.h>
 #include <asm/prom.h>
 #include <asm/processor.h>
 #include <asm/pgtable.h>
 #include <asm/setup.h>
-#include <asm/amigappc.h>
 #include <asm/smp.h>
 #include <asm/elf.h>
 #include <asm/cputable.h>
@@ -33,7 +30,6 @@
 #include <asm/btext.h>
 #include <asm/machdep.h>
 #include <asm/uaccess.h>
-#include <asm/system.h>
 #include <asm/pmac_feature.h>
 #include <asm/sections.h>
 #include <asm/nvram.h>
@@ -41,53 +37,27 @@
 #include <asm/time.h>
 #include <asm/serial.h>
 #include <asm/udbg.h>
-
-#include "setup.h"
+#include <asm/mmu_context.h>
+#include <asm/epapr_hcalls.h>
 
 #define DBG(fmt...)
 
-#if defined CONFIG_KGDB
-#include <asm/kgdb.h>
-#endif
-
-extern void platform_init(void);
 extern void bootx_init(unsigned long r4, unsigned long phys);
 
-extern void ppc6xx_idle(void);
-extern void power4_idle(void);
-
-boot_infos_t *boot_infos;
-struct ide_machdep_calls ppc_ide_md;
-
-int boot_cpuid;
-EXPORT_SYMBOL_GPL(boot_cpuid);
 int boot_cpuid_phys;
+EXPORT_SYMBOL_GPL(boot_cpuid_phys);
+
+int smp_hw_index[NR_CPUS];
 
 unsigned long ISA_DMA_THRESHOLD;
 unsigned int DMA_MODE_READ;
 unsigned int DMA_MODE_WRITE;
 
-int have_of = 1;
-
-#ifdef CONFIG_PPC_MULTIPLATFORM
-extern void prep_init(void);
-extern void pmac_init(void);
-extern void chrp_init(void);
-
-dev_t boot_dev;
-#endif /* CONFIG_PPC_MULTIPLATFORM */
-
-#ifdef CONFIG_MAGIC_SYSRQ
-unsigned long SYSRQ_KEY = 0x54;
-#endif /* CONFIG_MAGIC_SYSRQ */
-
 #ifdef CONFIG_VGA_CONSOLE
 unsigned long vgacon_remap_base;
+EXPORT_SYMBOL(vgacon_remap_base);
 #endif
 
-struct machdep_calls ppc_md;
-EXPORT_SYMBOL(ppc_md);
-
 /*
  * These are used in binfmt_elf.c to put aux entries on the stack
  * for each elf executable being started.
@@ -105,66 +75,39 @@ int ucache_bsize;
  * from the address that it was linked at, so we must use RELOC/PTRRELOC
  * to access static data (including strings).  -- paulus
  */
-unsigned long __init early_init(unsigned long dt_ptr)
+notrace unsigned long __init early_init(unsigned long dt_ptr)
 {
 	unsigned long offset = reloc_offset();
+	struct cpu_spec *spec;
 
 	/* First zero the BSS -- use memset_io, some platforms don't have
 	 * caches on yet */
-	memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
+	memset_io((void __iomem *)PTRRELOC(&__bss_start), 0,
+			__bss_stop - __bss_start);
 
 	/*
 	 * Identify the CPU type and fix up code sections
 	 * that depend on which cpu we have.
 	 */
-	identify_cpu(offset, 0);
-	do_cpu_ftr_fixups(offset);
+	spec = identify_cpu(offset, mfspr(SPRN_PVR));
 
-	return KERNELBASE + offset;
-}
+	do_feature_fixups(spec->cpu_features,
+			  PTRRELOC(&__start___ftr_fixup),
+			  PTRRELOC(&__stop___ftr_fixup));
 
-#ifdef CONFIG_PPC_MULTIPLATFORM
-/*
- * The PPC_MULTIPLATFORM version of platform_init...
- */
-void __init platform_init(void)
-{
-	/* if we didn't get any bootinfo telling us what we are... */
-	if (_machine == 0) {
-		/* prep boot loader tells us if we're prep or not */
-		if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
-			_machine = _MACH_prep;
-	}
+	do_feature_fixups(spec->mmu_features,
+			  PTRRELOC(&__start___mmu_ftr_fixup),
+			  PTRRELOC(&__stop___mmu_ftr_fixup));
 
-#ifdef CONFIG_PPC_PREP
-	/* not much more to do here, if prep */
-	if (_machine == _MACH_prep) {
-		prep_init();
-		return;
-	}
-#endif
+	do_lwsync_fixups(spec->cpu_features,
+			 PTRRELOC(&__start___lwsync_fixup),
+			 PTRRELOC(&__stop___lwsync_fixup));
 
-#ifdef CONFIG_ADB
-	if (strstr(cmd_line, "adb_sync")) {
-		extern int __adb_probe_sync;
-		__adb_probe_sync = 1;
-	}
-#endif /* CONFIG_ADB */
+	do_final_fixups();
 
-	switch (_machine) {
-#ifdef CONFIG_PPC_PMAC
-	case _MACH_Pmac:
-		pmac_init();
-		break;
-#endif
-#ifdef CONFIG_PPC_CHRP
-	case _MACH_chrp:
-		chrp_init();
-		break;
-#endif
-	}
+	return KERNELBASE + offset;
 }
-#endif
+
 
 /*
  * Find out what kind of machine we're on and save any data we need
@@ -172,56 +115,39 @@ void __init platform_init(void)
  * This is called very early on the boot process, after a minimal
  * MMU environment has been set up but before MMU_init is called.
  */
-void __init machine_init(unsigned long dt_ptr, unsigned long phys)
+notrace void __init machine_init(u64 dt_ptr)
 {
-	/* If btext is enabled, we might have a BAT setup for early display,
-	 * thus we do enable some very basic udbg output
-	 */
-#ifdef CONFIG_BOOTX_TEXT
-	udbg_putc = btext_drawchar;
-#endif
+	lockdep_init();
+
+	/* Enable early debugging if any specified (see udbg.h) */
+	udbg_early_init();
 
 	/* Do some early initialization based on the flat device tree */
 	early_init_devtree(__va(dt_ptr));
 
-	/* Check default command line */
-#ifdef CONFIG_CMDLINE
-	if (cmd_line[0] == 0)
-		strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
-#endif /* CONFIG_CMDLINE */
+	epapr_paravirt_early_init();
 
-	/* Base init based on machine type */
-	platform_init();
+	early_init_mmu();
+
+	probe_machine();
+
+	setup_kdump_trampoline();
 
 #ifdef CONFIG_6xx
-	ppc_md.power_save = ppc6xx_idle;
+	if (cpu_has_feature(CPU_FTR_CAN_DOZE) ||
+	    cpu_has_feature(CPU_FTR_CAN_NAP))
+		ppc_md.power_save = ppc6xx_idle;
 #endif
 
+#ifdef CONFIG_E500
+	if (cpu_has_feature(CPU_FTR_CAN_DOZE) ||
+	    cpu_has_feature(CPU_FTR_CAN_NAP))
+		ppc_md.power_save = e500_idle;
+#endif
 	if (ppc_md.progress)
 		ppc_md.progress("id mach(): done", 0x200);
 }
 
-#ifdef CONFIG_BOOKE_WDT
-/* Checks wdt=x and wdt_period=xx command-line option */
-int __init early_parse_wdt(char *p)
-{
-	if (p && strncmp(p, "0", 1) != 0)
-	       booke_wdt_enabled = 1;
-
-	return 0;
-}
-early_param("wdt", early_parse_wdt);
-
-int __init early_parse_wdt_period (char *p)
-{
-	if (p)
-		booke_wdt_period = simple_strtoul(p, NULL, 0);
-
-	return 0;
-}
-early_param("wdt_period", early_parse_wdt_period);
-#endif	/* CONFIG_BOOKE_WDT */
-
 /* Checks "l2cr=xxxx" command-line option */
 int __init ppc_setup_l2cr(char *str)
 {
@@ -235,6 +161,18 @@ int __init ppc_setup_l2cr(char *str)
 }
 __setup("l2cr=", ppc_setup_l2cr);
 
+/* Checks "l3cr=xxxx" command-line option */
+int __init ppc_setup_l3cr(char *str)
+{
+	if (cpu_has_feature(CPU_FTR_L3CR)) {
+		unsigned long val = simple_strtoul(str, NULL, 0);
+		printk(KERN_INFO "l3cr set to %lx\n", val);
+		_set_L3CR(val);		/* and enable it */
+	}
+	return 1;
+}
+__setup("l3cr=", ppc_setup_l3cr);
+
 #ifdef CONFIG_GENERIC_NVRAM
 
 /* Generic nvram hooks used by drivers/char/gen_nvram.c */
@@ -253,6 +191,14 @@ void nvram_write_byte(unsigned char val, int addr)
 }
 EXPORT_SYMBOL(nvram_write_byte);
 
+ssize_t nvram_get_size(void)
+{
+	if (ppc_md.nvram_size)
+		return ppc_md.nvram_size();
+	return -1;
+}
+EXPORT_SYMBOL(nvram_get_size);
+
 void nvram_sync(void)
 {
 	if (ppc_md.nvram_sync)
@@ -262,19 +208,11 @@ 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);
+	if (ppc_md.progress)
+		ppc_md.progress("             ", 0xffff);
 
 	/* call platform init */
 	if (ppc_md.init != NULL) {
@@ -285,10 +223,52 @@ int __init ppc_init(void)
 
 arch_initcall(ppc_init);
 
+static void __init irqstack_early_init(void)
+{
+	unsigned int i;
+
+	/* interrupt stacks must be in lowmem, we get that for free on ppc32
+	 * as the memblock is limited to lowmem by default */
+	for_each_possible_cpu(i) {
+		softirq_ctx[i] = (struct thread_info *)
+			__va(memblock_alloc(THREAD_SIZE, THREAD_SIZE));
+		hardirq_ctx[i] = (struct thread_info *)
+			__va(memblock_alloc(THREAD_SIZE, THREAD_SIZE));
+	}
+}
+
+#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
+static void __init exc_lvl_early_init(void)
+{
+	unsigned int i, hw_cpu;
+
+	/* interrupt stacks must be in lowmem, we get that for free on ppc32
+	 * as the memblock is limited to lowmem by MEMBLOCK_REAL_LIMIT */
+	for_each_possible_cpu(i) {
+#ifdef CONFIG_SMP
+		hw_cpu = get_hard_smp_processor_id(i);
+#else
+		hw_cpu = 0;
+#endif
+
+		critirq_ctx[hw_cpu] = (struct thread_info *)
+			__va(memblock_alloc(THREAD_SIZE, THREAD_SIZE));
+#ifdef CONFIG_BOOKE
+		dbgirq_ctx[hw_cpu] = (struct thread_info *)
+			__va(memblock_alloc(THREAD_SIZE, THREAD_SIZE));
+		mcheckirq_ctx[hw_cpu] = (struct thread_info *)
+			__va(memblock_alloc(THREAD_SIZE, THREAD_SIZE));
+#endif
+	}
+}
+#else
+#define exc_lvl_early_init()
+#endif
+
 /* Warning, IO base is not yet inited */
 void __init setup_arch(char **cmdline_p)
 {
-	extern void do_init_bootmem(void);
+	*cmdline_p = cmd_line;
 
 	/* so udelay does something sensible, assume <= 1000 bogomips */
 	loops_per_jiffy = 500000000 / HZ;
@@ -300,74 +280,51 @@ void __init setup_arch(char **cmdline_p)
 		ppc_md.init_early();
 
 	find_legacy_serial_ports();
-	finish_device_tree();
 
 	smp_setup_cpu_maps();
 
-#ifdef CONFIG_XMON_DEFAULT
-	xmon_init(1);
-#endif
 	/* Register early console */
 	register_early_udbg_console();
 
-#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
+	xmon_setup();
 
 	/*
 	 * 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;
+	dcache_bsize = cur_cpu_spec->dcache_bsize;
+	icache_bsize = cur_cpu_spec->icache_bsize;
+	ucache_bsize = 0;
+	if (cpu_has_feature(CPU_FTR_UNIFIED_ID_CACHE))
+		ucache_bsize = icache_bsize = dcache_bsize;
+
+	if (ppc_md.panic)
+		setup_panic();
+
+	init_mm.start_code = (unsigned long)_stext;
 	init_mm.end_code = (unsigned long) _etext;
 	init_mm.end_data = (unsigned long) _edata;
 	init_mm.brk = klimit;
 
-	/* Save unparsed command line copy for /proc/cmdline */
-	strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
-	*cmdline_p = cmd_line;
+	exc_lvl_early_init();
 
-	parse_early_param();
+	irqstack_early_init();
 
 	/* 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.setup_arch)
+		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;
+	/* Initialize the MMU context management stuff */
+	mmu_context_init();
 }