* 2 of the License, or (at your option) any later version.
*/
+#undef DEBUG
+
#include <linux/config.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/root_dev.h>
#include <linux/notifier.h>
#include <linux/cpu.h>
+#include <linux/unistd.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/processor.h>
#include <asm/setup.h>
#include <asm/system.h>
#include <asm/rtas.h>
+#include <asm/iommu.h>
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+/*
+ * Here are some early debugging facilities. You can enable one
+ * but your kernel will not boot on anything else if you do so
+ */
+
+/* This one is for use on LPAR machines that support an HVC console
+ * on vterm 0
+ */
+extern void udbg_init_debug_lpar(void);
+/* This one is for use on Apple G5 machines
+ */
+extern void udbg_init_pmac_realmode(void);
+/* That's RTAS panel debug */
+extern void call_rtas_display_status_delay(unsigned char c);
+
+#define EARLY_DEBUG_INIT() do {} while(0)
+
+#if 0
+#define EARLY_DEBUG_INIT() udbg_init_debug_lpar()
+#define EARLY_DEBUG_INIT() udbg_init_pmac_realmode()
+#define EARLY_DEBUG_INIT() \
+ do { ppc_md.udbg_putc = call_rtas_display_status_delay; } while(0)
+#endif
-extern unsigned long klimit;
/* extern void *stab; */
extern HTAB htab_data;
-extern unsigned long loops_per_jiffy;
-
-int have_of = 1;
+extern unsigned long klimit;
-extern void chrp_init(unsigned long r3,
- unsigned long r4,
- unsigned long r5,
- unsigned long r6,
- unsigned long r7);
-
-extern void pmac_init(unsigned long r3,
- unsigned long r4,
- unsigned long r5,
- unsigned long r6,
- unsigned long r7);
-
-extern void iSeries_init( void );
-extern void iSeries_init_early( void );
-extern void pSeries_init_early( void );
-extern void pSeriesLP_init_early(void);
-extern void pmac_init_early(void);
-extern void mm_init_ppc64( void );
-extern void pseries_secondary_smp_init(unsigned long);
+extern void mm_init_ppc64(void);
extern int idle_setup(void);
-extern void vpa_init(int cpu);
+extern void stab_initialize(unsigned long stab);
+extern void htab_initialize(void);
+extern void early_init_devtree(void *flat_dt);
+extern void unflatten_device_tree(void);
unsigned long decr_overclock = 1;
unsigned long decr_overclock_proc0 = 1;
unsigned long decr_overclock_set = 0;
unsigned long decr_overclock_proc0_set = 0;
-int powersave_nap;
+int have_of = 1;
+int boot_cpuid = 0;
+dev_t boot_dev;
-unsigned char aux_device_present;
+/*
+ * These are used in binfmt_elf.c to put aux entries on the stack
+ * for each elf executable being started.
+ */
+int dcache_bsize;
+int icache_bsize;
+int ucache_bsize;
-void parse_cmd_line(unsigned long r3, unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7);
-int parse_bootinfo(void);
+/* The main machine-dep calls structure
+ */
+struct machdep_calls ppc_md;
#ifdef CONFIG_MAGIC_SYSRQ
unsigned long SYSRQ_KEY;
#endif /* CONFIG_MAGIC_SYSRQ */
-struct machdep_calls ppc_md;
static int ppc64_panic_event(struct notifier_block *, unsigned long, void *);
-
static struct notifier_block ppc64_panic_block = {
- notifier_call: ppc64_panic_event,
- priority: INT_MIN /* may not return; must be done last */
+ .notifier_call = ppc64_panic_event,
+ .priority = INT_MIN /* may not return; must be done last */
};
/*
* these processors use on existing boards. -- Dan
*/
struct screen_info screen_info = {
- 0, 25, /* orig-x, orig-y */
- 0, /* unused */
- 0, /* orig-video-page */
- 0, /* orig-video-mode */
- 80, /* orig-video-cols */
- 0,0,0, /* ega_ax, ega_bx, ega_cx */
- 25, /* orig-video-lines */
- 1, /* orig-video-isVGA */
- 16 /* orig-video-points */
+ .orig_x = 0,
+ .orig_y = 25,
+ .orig_video_cols = 80,
+ .orig_video_lines = 25,
+ .orig_video_isVGA = 1,
+ .orig_video_points = 16
};
-/*
- * These are used in binfmt_elf.c to put aux entries on the stack
- * for each elf executable being started.
- */
-int dcache_bsize;
-int icache_bsize;
-int ucache_bsize;
-
/*
* Initialize the PPCDBG state. Called before relocation has been enabled.
*/
-void ppcdbg_initialize(void) {
- unsigned long offset = reloc_offset();
- struct naca_struct *_naca = RELOC(naca);
-
- _naca->debug_switch = PPC_DEBUG_DEFAULT; /* | PPCDBG_BUSWALK | PPCDBG_PHBINIT | PPCDBG_MM | PPCDBG_MMINIT | PPCDBG_TCEINIT | PPCDBG_TCE */;
+void __init ppcdbg_initialize(void)
+{
+ naca->debug_switch = PPC_DEBUG_DEFAULT; /* | PPCDBG_BUSWALK | */
+ /* PPCDBG_PHBINIT | PPCDBG_MM | PPCDBG_MMINIT | PPCDBG_TCEINIT | PPCDBG_TCE */;
}
+/*
+ * Early boot console based on udbg
+ */
static struct console udbg_console = {
.name = "udbg",
.write = udbg_console_write,
.flags = CON_PRINTBUFFER,
.index = -1,
};
-
static int early_console_initialized;
void __init disable_early_printk(void)
early_console_initialized = 0;
}
-/*
- * Do some initial setup of the system. The parameters are those which
- * were passed in from the bootloader.
+#if defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_SMP)
+
+static int smt_enabled_cmdline;
+
+/* Look for ibm,smt-enabled OF option */
+static void check_smt_enabled(void)
+{
+ struct device_node *dn;
+ char *smt_option;
+
+ /* Allow the command line to overrule the OF option */
+ if (smt_enabled_cmdline)
+ return;
+
+ dn = of_find_node_by_path("/options");
+
+ if (dn) {
+ smt_option = (char *)get_property(dn, "ibm,smt-enabled", NULL);
+
+ if (smt_option) {
+ if (!strcmp(smt_option, "on"))
+ smt_enabled_at_boot = 1;
+ else if (!strcmp(smt_option, "off"))
+ smt_enabled_at_boot = 0;
+ }
+ }
+}
+
+/* Look for smt-enabled= cmdline option */
+static int __init early_smt_enabled(char *p)
+{
+ smt_enabled_cmdline = 1;
+
+ if (!p)
+ return 0;
+
+ if (!strcmp(p, "on") || !strcmp(p, "1"))
+ smt_enabled_at_boot = 1;
+ else if (!strcmp(p, "off") || !strcmp(p, "0"))
+ smt_enabled_at_boot = 0;
+
+ return 0;
+}
+early_param("smt-enabled", early_smt_enabled);
+
+/**
+ * setup_cpu_maps - initialize the following cpu maps:
+ * cpu_possible_map
+ * cpu_present_map
+ * cpu_sibling_map
+ *
+ * Having the possible map set up early allows us to restrict allocations
+ * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
+ *
+ * We do not initialize the online map here; cpus set their own bits in
+ * cpu_online_map as they come up.
+ *
+ * This function is valid only for Open Firmware systems. finish_device_tree
+ * must be called before using this.
+ *
+ * While we're here, we may as well set the "physical" cpu ids in the paca.
*/
-void setup_system(unsigned long r3, unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7)
+static void __init setup_cpu_maps(void)
{
-#if defined(CONFIG_SMP) && defined(CONFIG_PPC_PSERIES)
- int ret, i;
-#endif
+ struct device_node *dn = NULL;
+ int cpu = 0;
+
+ check_smt_enabled();
+
+ while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
+ u32 *intserv;
+ int j, len = sizeof(u32), nthreads;
+
+ intserv = (u32 *)get_property(dn, "ibm,ppc-interrupt-server#s",
+ &len);
+ if (!intserv)
+ intserv = (u32 *)get_property(dn, "reg", NULL);
+
+ nthreads = len / sizeof(u32);
+
+ for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
+ /*
+ * Only spin up secondary threads if SMT is enabled.
+ * We must leave space in the logical map for the
+ * threads.
+ */
+ if (j == 0 || smt_enabled_at_boot) {
+ cpu_set(cpu, cpu_present_map);
+ set_hard_smp_processor_id(cpu, intserv[j]);
+ }
+ cpu_set(cpu, cpu_possible_map);
+ cpu++;
+ }
+ }
-#ifdef CONFIG_XMON_DEFAULT
- xmon_init();
-#endif
+ /*
+ * On pSeries LPAR, we need to know how many cpus
+ * could possibly be added to this partition.
+ */
+ if (systemcfg->platform == PLATFORM_PSERIES_LPAR &&
+ (dn = of_find_node_by_path("/rtas"))) {
+ int num_addr_cell, num_size_cell, maxcpus;
+ unsigned int *ireg;
+
+ num_addr_cell = prom_n_addr_cells(dn);
+ num_size_cell = prom_n_size_cells(dn);
+
+ ireg = (unsigned int *)
+ get_property(dn, "ibm,lrdr-capacity", NULL);
+
+ if (!ireg)
+ goto out;
+
+ maxcpus = ireg[num_addr_cell + num_size_cell];
+
+ /* Double maxcpus for processors which have SMT capability */
+ if (cur_cpu_spec->cpu_features & CPU_FTR_SMT)
+ maxcpus *= 2;
+
+ if (maxcpus > NR_CPUS) {
+ printk(KERN_WARNING
+ "Partition configured for %d cpus, "
+ "operating system maximum is %d.\n",
+ maxcpus, NR_CPUS);
+ maxcpus = NR_CPUS;
+ } else
+ printk(KERN_INFO "Partition configured for %d cpus.\n",
+ maxcpus);
+
+ for (cpu = 0; cpu < maxcpus; cpu++)
+ cpu_set(cpu, cpu_possible_map);
+ out:
+ of_node_put(dn);
+ }
+
+ /*
+ * Do the sibling map; assume only two threads per processor.
+ */
+ for_each_cpu(cpu) {
+ cpu_set(cpu, cpu_sibling_map[cpu]);
+ if (cur_cpu_spec->cpu_features & CPU_FTR_SMT)
+ cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
+ }
+
+ systemcfg->processorCount = num_present_cpus();
+}
+#endif /* defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_SMP) */
-#ifdef CONFIG_PPC_ISERIES
- /* pSeries systems are identified in prom.c via OF. */
- if ( itLpNaca.xLparInstalled == 1 )
- systemcfg->platform = PLATFORM_ISERIES_LPAR;
-#endif
-
- switch (systemcfg->platform) {
-#ifdef CONFIG_PPC_ISERIES
- case PLATFORM_ISERIES_LPAR:
- iSeries_init_early();
- break;
-#endif
+#ifdef CONFIG_PPC_MULTIPLATFORM
+
+extern struct machdep_calls pSeries_md;
+extern struct machdep_calls pmac_md;
+
+/* Ultimately, stuff them in an elf section like initcalls... */
+static struct machdep_calls __initdata *machines[] = {
#ifdef CONFIG_PPC_PSERIES
- case PLATFORM_PSERIES:
- pSeries_init_early();
- parse_bootinfo();
- break;
-
- case PLATFORM_PSERIES_LPAR:
- pSeriesLP_init_early();
- parse_bootinfo();
- break;
+ &pSeries_md,
#endif /* CONFIG_PPC_PSERIES */
#ifdef CONFIG_PPC_PMAC
- case PLATFORM_POWERMAC:
- pmac_init_early();
- parse_bootinfo();
+ &pmac_md,
#endif /* CONFIG_PPC_PMAC */
+ NULL
+};
+
+/*
+ * Early initialization entry point. This is called by head.S
+ * with MMU translation disabled. We rely on the "feature" of
+ * the CPU that ignores the top 2 bits of the address in real
+ * mode so we can access kernel globals normally provided we
+ * only toy with things in the RMO region. From here, we do
+ * some early parsing of the device-tree to setup out LMB
+ * data structures, and allocate & initialize the hash table
+ * and segment tables so we can start running with translation
+ * enabled.
+ *
+ * It is this function which will call the probe() callback of
+ * the various platform types and copy the matching one to the
+ * global ppc_md structure. Your platform can eventually do
+ * some very early initializations from the probe() routine, but
+ * this is not recommended, be very careful as, for example, the
+ * device-tree is not accessible via normal means at this point.
+ */
+
+void __init early_setup(unsigned long dt_ptr)
+{
+ struct paca_struct *lpaca = get_paca();
+ static struct machdep_calls **mach;
+
+ /*
+ * Enable early debugging if any specified (see top of
+ * this file)
+ */
+ EARLY_DEBUG_INIT();
+
+ DBG(" -> early_setup()\n");
+
+ /*
+ * Fill the default DBG level in naca (do we want to keep
+ * that old mecanism around forever ?)
+ */
+ ppcdbg_initialize();
+
+ /*
+ * Do early initializations using the flattened device
+ * tree, like retreiving the physical memory map or
+ * calculating/retreiving the hash table size
+ */
+ early_init_devtree(__va(dt_ptr));
+
+ /*
+ * Iterate all ppc_md structures until we find the proper
+ * one for the current machine type
+ */
+ DBG("Probing machine type for platform %x...\n",
+ systemcfg->platform);
+
+ for (mach = machines; *mach; mach++) {
+ if ((*mach)->probe(systemcfg->platform))
+ break;
+ }
+ /* What can we do if we didn't find ? */
+ if (*mach == NULL) {
+ DBG("No suitable machine found !\n");
+ for (;;);
+ }
+ ppc_md = **mach;
+
+ /* our udbg callbacks got overriden by the above, let's put them
+ * back in. Ultimately, I want those things to be split from the
+ * main ppc_md
+ */
+ EARLY_DEBUG_INIT();
+
+ DBG("Found, Initializing memory management...\n");
+
+ /*
+ * Initialize stab / SLB management
+ */
+ stab_initialize(lpaca->stab_real);
+
+ /*
+ * Initialize the MMU Hash table and create the linear mapping
+ * of memory
+ */
+ htab_initialize();
+
+ DBG(" <- early_setup()\n");
+}
+
+
+/*
+ * Initialize some remaining members of the naca and systemcfg structures
+ * (at least until we get rid of them completely). This is mostly some
+ * cache informations about the CPU that will be used by cache flush
+ * routines and/or provided to userland
+ */
+static void __init initialize_naca(void)
+{
+ struct device_node *np;
+ unsigned long num_cpus = 0;
+
+ DBG(" -> initialize_naca()\n");
+
+ for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) {
+ num_cpus += 1;
+
+ /* We're assuming *all* of the CPUs have the same
+ * d-cache and i-cache sizes... -Peter
+ */
+
+ if ( num_cpus == 1 ) {
+ u32 *sizep, *lsizep;
+ u32 size, lsize;
+ const char *dc, *ic;
+
+ /* Then read cache informations */
+ if (systemcfg->platform == PLATFORM_POWERMAC) {
+ dc = "d-cache-block-size";
+ ic = "i-cache-block-size";
+ } else {
+ dc = "d-cache-line-size";
+ ic = "i-cache-line-size";
+ }
+
+ size = 0;
+ lsize = cur_cpu_spec->dcache_bsize;
+ sizep = (u32 *)get_property(np, "d-cache-size", NULL);
+ if (sizep != NULL)
+ size = *sizep;
+ lsizep = (u32 *) get_property(np, dc, NULL);
+ if (lsizep != NULL)
+ lsize = *lsizep;
+
+ if (sizep == 0 || lsizep == 0)
+ DBG("Argh, can't find dcache properties ! "
+ "sizep: %p, lsizep: %p\n", sizep, lsizep);
+
+ systemcfg->dCacheL1Size = size;
+ systemcfg->dCacheL1LineSize = lsize;
+ naca->dCacheL1LogLineSize = __ilog2(lsize);
+ naca->dCacheL1LinesPerPage = PAGE_SIZE/(lsize);
+
+ size = 0;
+ lsize = cur_cpu_spec->icache_bsize;
+ sizep = (u32 *)get_property(np, "i-cache-size", NULL);
+ if (sizep != NULL)
+ size = *sizep;
+ lsizep = (u32 *)get_property(np, ic, NULL);
+ if (lsizep != NULL)
+ lsize = *lsizep;
+ if (sizep == 0 || lsizep == 0)
+ DBG("Argh, can't find icache properties ! "
+ "sizep: %p, lsizep: %p\n", sizep, lsizep);
+
+ systemcfg->iCacheL1Size = size;
+ systemcfg->iCacheL1LineSize = lsize;
+ naca->iCacheL1LogLineSize = __ilog2(lsize);
+ naca->iCacheL1LinesPerPage = PAGE_SIZE/(lsize);
+
+ }
+ }
+
+ /* Add an eye catcher and the systemcfg layout version number */
+ strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64");
+ systemcfg->version.major = SYSTEMCFG_MAJOR;
+ systemcfg->version.minor = SYSTEMCFG_MINOR;
+ systemcfg->processor = mfspr(SPRN_PVR);
+
+ DBG(" <- initialize_naca()\n");
+}
+
+static void __init check_for_initrd(void)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+ u64 *prop;
+
+ DBG(" -> check_for_initrd()\n");
+
+ prop = (u64 *)get_property(of_chosen, "linux,initrd-start", NULL);
+ if (prop != NULL) {
+ initrd_start = (unsigned long)__va(*prop);
+ prop = (u64 *)get_property(of_chosen, "linux,initrd-end", NULL);
+ if (prop != NULL) {
+ initrd_end = (unsigned long)__va(*prop);
+ initrd_below_start_ok = 1;
+ } else
+ initrd_start = 0;
}
/* If we were passed an initrd, set the ROOT_DEV properly if the values
* look sensible. If not, clear initrd reference.
*/
-#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE &&
initrd_end > initrd_start)
ROOT_DEV = Root_RAM0;
else
initrd_start = initrd_end = 0;
+
+ if (initrd_start)
+ printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end);
+
+ DBG(" <- check_for_initrd()\n");
#endif /* CONFIG_BLK_DEV_INITRD */
+}
-#ifdef CONFIG_BOOTX_TEXT
- map_boot_text();
- if (systemcfg->platform == PLATFORM_POWERMAC) {
- early_console_initialized = 1;
- register_console(&udbg_console);
- }
-#endif /* CONFIG_BOOTX_TEXT */
+#endif /* CONFIG_PPC_MULTIPLATFORM */
-#ifdef CONFIG_PPC_PSERIES
- if (systemcfg->platform & PLATFORM_PSERIES) {
- early_console_initialized = 1;
- register_console(&udbg_console);
- __irq_offset_value = NUM_ISA_INTERRUPTS;
- finish_device_tree();
- chrp_init(r3, r4, r5, r6, r7);
+/*
+ * Do some initial setup of the system. The parameters are those which
+ * were passed in from the bootloader.
+ */
+void __init setup_system(void)
+{
+ DBG(" -> setup_system()\n");
-#ifdef CONFIG_SMP
- /* Start secondary threads on SMT systems */
- for (i = 0; i < NR_CPUS; i++) {
- if (cpu_available(i) && !cpu_possible(i)) {
- printk("%16.16x : starting thread\n", i);
- rtas_call(rtas_token("start-cpu"), 3, 1, &ret,
- get_hard_smp_processor_id(i),
- (u32)*((unsigned long *)pseries_secondary_smp_init),
- i);
- cpu_set(i, cpu_possible_map);
- systemcfg->processorCount++;
- }
- }
-#endif /* CONFIG_SMP */
- }
+#ifdef CONFIG_PPC_ISERIES
+ /* pSeries systems are identified in prom.c via OF. */
+ if (itLpNaca.xLparInstalled == 1)
+ systemcfg->platform = PLATFORM_ISERIES_LPAR;
+
+ ppc_md.init_early();
+#else /* CONFIG_PPC_ISERIES */
+
+ /*
+ * Unflatten the device-tree passed by prom_init or kexec
+ */
+ unflatten_device_tree();
+
+ /*
+ * Fill the naca & systemcfg structures with informations
+ * retreived from the device-tree. Need to be called before
+ * finish_device_tree() since the later requires some of the
+ * informations filled up here to properly parse the interrupt
+ * tree.
+ * It also sets up the cache line sizes which allows to call
+ * routines like flush_icache_range (used by the hash init
+ * later on).
+ */
+ initialize_naca();
+
+#ifdef CONFIG_PPC_PSERIES
+ /*
+ * Initialize RTAS if available
+ */
+ rtas_initialize();
#endif /* CONFIG_PPC_PSERIES */
-#ifdef CONFIG_PPC_PMAC
- if (systemcfg->platform == PLATFORM_POWERMAC) {
- finish_device_tree();
- pmac_init(r3, r4, r5, r6, r7);
- }
-#endif /* CONFIG_PPC_PMAC */
+ /*
+ * Check if we have an initrd provided via the device-tree
+ */
+ check_for_initrd();
-#if defined(CONFIG_HOTPLUG_CPU) && !defined(CONFIG_PPC_PMAC)
- rtas_stop_self_args.token = rtas_token("stop-self");
-#endif /* CONFIG_HOTPLUG_CPU && !CONFIG_PPC_PMAC */
+ /*
+ * Do some platform specific early initializations, that includes
+ * setting up the hash table pointers. It also sets up some interrupt-mapping
+ * related options that will be used by finish_device_tree()
+ */
+ ppc_md.init_early();
- /* Finish initializing the hash table (do the dynamic
- * patching for the fast-path hashtable.S code)
+ /*
+ * "Finish" the device-tree, that is do the actual parsing of
+ * some of the properties like the interrupt map
*/
- htab_finish_init();
+ finish_device_tree();
+
+ /*
+ * Initialize xmon
+ */
+#ifdef CONFIG_XMON_DEFAULT
+ xmon_init();
+#endif
+ /*
+ * Register early console
+ */
+ early_console_initialized = 1;
+ register_console(&udbg_console);
+
+#endif /* !CONFIG_PPC_ISERIES */
+
+ /* Save unparsed command line copy for /proc/cmdline */
+ strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
+
+ parse_early_param();
+
+#if defined(CONFIG_SMP) && !defined(CONFIG_PPC_ISERIES)
+ /*
+ * iSeries has already initialized the cpu maps at this point.
+ */
+ setup_cpu_maps();
+#endif /* defined(CONFIG_SMP) && !defined(CONFIG_PPC_ISERIES) */
printk("Starting Linux PPC64 %s\n", UTS_RELEASE);
mm_init_ppc64();
-#if defined(CONFIG_SMP) && defined(CONFIG_PPC_PSERIES)
- if (cur_cpu_spec->firmware_features & FW_FEATURE_SPLPAR) {
- vpa_init(boot_cpuid);
- }
-#endif
-
- /* Select the correct idle loop for the platform. */
- idle_setup();
-
- switch (systemcfg->platform) {
-#ifdef CONFIG_PPC_ISERIES
- case PLATFORM_ISERIES_LPAR:
- iSeries_init();
- break;
-#endif
- default:
- /* The following relies on the device tree being */
- /* fully configured. */
- parse_cmd_line(r3, r4, r5, r6, r7);
- }
+ DBG(" <- setup_system()\n");
}
+
void machine_restart(char *cmd)
{
if (ppc_md.nvram_sync)
#ifdef CONFIG_SMP
pvr = per_cpu(pvr, cpu_id);
#else
- pvr = _get_PVR();
+ pvr = mfspr(SPRN_PVR);
#endif
maj = (pvr >> 8) & 0xFF;
min = pvr & 0xFF;
.show = show_cpuinfo,
};
-/*
- * Fetch the cmd_line from open firmware.
- */
-void parse_cmd_line(unsigned long r3, unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7)
-{
- cmd_line[0] = 0;
+#if 0 /* XXX not currently used */
+unsigned long memory_limit;
-#ifdef CONFIG_CMDLINE
- strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
-#endif /* CONFIG_CMDLINE */
+static int __init early_parsemem(char *p)
+{
+ if (!p)
+ return 0;
-#ifdef CONFIG_PPC_PSERIES
- {
- struct device_node *chosen;
-
- chosen = of_find_node_by_name(NULL, "chosen");
- if (chosen != NULL) {
- char *p;
- p = get_property(chosen, "bootargs", NULL);
- if (p != NULL && p[0] != 0)
- strlcpy(cmd_line, p, sizeof(cmd_line));
- of_node_put(chosen);
- }
- }
-#endif
+ memory_limit = memparse(p, &p);
- /* Look for mem= option on command line */
- if (strstr(cmd_line, "mem=")) {
- char *p, *q;
- unsigned long maxmem = 0;
- extern unsigned long __max_memory;
-
- for (q = cmd_line; (p = strstr(q, "mem=")) != 0; ) {
- q = p + 4;
- if (p > cmd_line && p[-1] != ' ')
- continue;
- maxmem = simple_strtoul(q, &q, 0);
- if (*q == 'k' || *q == 'K') {
- maxmem <<= 10;
- ++q;
- } else if (*q == 'm' || *q == 'M') {
- maxmem <<= 20;
- ++q;
- }
- }
- __max_memory = maxmem;
- }
+ return 0;
}
+early_param("mem", early_parsemem);
+#endif
-#ifdef CONFIG_PPC_PSERIES
+#ifdef CONFIG_PPC_MULTIPLATFORM
static int __init set_preferred_console(void)
{
struct device_node *prom_stdout;
char *name;
- int offset;
+ int offset = 0;
+#if 0
+ phandle *stdout_ph;
+#endif
+ DBG(" -> set_preferred_console()\n");
/* The user has requested a console so this is already set up. */
- if (strstr(saved_command_line, "console="))
+ if (strstr(saved_command_line, "console=")) {
+ DBG(" console was specified !\n");
return -EBUSY;
+ }
- prom_stdout = find_path_device(of_stdout_device);
- if (!prom_stdout)
+ if (!of_chosen) {
+ DBG(" of_chosen is NULL !\n");
return -ENODEV;
+ }
+ /* We are getting a weird phandle from OF ... */
+#if 0
+ stdout_ph = (phandle *)get_property(of_chosen, "linux,stdout-package", NULL);
+ if (stdout_ph == NULL) {
+ DBG(" no linux,stdout-package !\n");
+ return -ENODEV;
+ }
+ prom_stdout = of_find_node_by_phandle(*stdout_ph);
+ if (!prom_stdout) {
+ DBG(" can't find stdout package for phandle 0x%x !\n", *stdout_ph);
+ return -ENODEV;
+ }
+#endif
+ /* ... So use the full path instead */
+#if 1
+ name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
+ if (name == NULL) {
+ DBG(" no linux,stdout-path !\n");
+ return -ENODEV;
+ }
+ prom_stdout = of_find_node_by_path(name);
+ if (!prom_stdout) {
+ DBG(" can't find stdout package %s !\n", name);
+ return -ENODEV;
+ }
+#endif
+ DBG("stdout is %s\n", prom_stdout->full_name);
name = (char *)get_property(prom_stdout, "name", NULL);
- if (!name)
- return -ENODEV;
+ if (!name) {
+ DBG(" stdout package has no name !\n");
+ goto not_found;
+ }
if (strcmp(name, "serial") == 0) {
int i;
break;
default:
/* We dont recognise the serial port */
- return -ENODEV;
+ goto not_found;
}
}
- } else if (strcmp(name, "vty") == 0)
- /* pSeries LPAR virtual console */
- return add_preferred_console("hvc", 0, NULL);
+ }
+#ifdef CONFIG_PPC_PSERIES
+ else if (strcmp(name, "vty") == 0) {
+ u32 *reg = (u32 *)get_property(prom_stdout, "reg", NULL);
+ char *compat = (char *)get_property(prom_stdout, "compatible", NULL);
+
+ if (reg && compat && (strcmp(compat, "hvterm-protocol") == 0)) {
+ /* Host Virtual Serial Interface */
+ int offset;
+ switch (reg[0]) {
+ case 0x30000000:
+ offset = 0;
+ break;
+ case 0x30000001:
+ offset = 1;
+ break;
+ default:
+ goto not_found;
+ }
+ of_node_put(prom_stdout);
+ DBG("Found hvsi console at offset %d\n", offset);
+ return add_preferred_console("hvsi", offset, NULL);
+ } else {
+ /* pSeries LPAR virtual console */
+ of_node_put(prom_stdout);
+ DBG("Found hvc console\n");
+ return add_preferred_console("hvc", 0, NULL);
+ }
+ }
+#endif /* CONFIG_PPC_PSERIES */
else if (strcmp(name, "ch-a") == 0)
offset = 0;
else if (strcmp(name, "ch-b") == 0)
offset = 1;
else
- return -ENODEV;
+ goto not_found;
+ of_node_put(prom_stdout);
+
+ DBG("Found serial console at ttyS%d\n", offset);
return add_preferred_console("ttyS", offset, NULL);
+ not_found:
+ DBG("No preferred console found !\n");
+ of_node_put(prom_stdout);
+ return -ENODEV;
}
console_initcall(set_preferred_console);
-
-int parse_bootinfo(void)
-{
- struct bi_record *rec;
-
- rec = prom.bi_recs;
-
- if ( rec == NULL || rec->tag != BI_FIRST )
- return -1;
-
- for ( ; rec->tag != BI_LAST ; rec = bi_rec_next(rec) ) {
- switch (rec->tag) {
- case BI_CMD_LINE:
- strlcpy(cmd_line, (void *)rec->data, sizeof(cmd_line));
- break;
- }
- }
-
- return 0;
-}
-#endif
-
-int __init ppc_init(void)
-{
- /* clear the progress line */
- ppc_md.progress(" ", 0xffff);
-
- if (ppc_md.init != NULL) {
- ppc_md.init();
- }
- return 0;
-}
-
-arch_initcall(ppc_init);
-
-void __init ppc64_calibrate_delay(void)
-{
- loops_per_jiffy = tb_ticks_per_jiffy;
-
- printk("Calibrating delay loop... %lu.%02lu BogoMips\n",
- loops_per_jiffy/(500000/HZ),
- loops_per_jiffy/(5000/HZ) % 100);
-}
-
-extern void (*calibrate_delay)(void);
+#endif /* CONFIG_PPC_MULTIPLATFORM */
#ifdef CONFIG_IRQSTACKS
static void __init irqstack_early_init(void)
{
- int i;
+ unsigned int i;
- /* interrupt stacks must be under 256MB, we cannot afford to take SLB misses on them */
- for (i = 0; i < NR_CPUS; i++) {
+ /*
+ * interrupt stacks must be under 256MB, we cannot afford to take
+ * SLB misses on them.
+ */
+ for_each_cpu(i) {
softirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE,
THREAD_SIZE, 0x10000000));
hardirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE,
#define irqstack_early_init()
#endif
+/*
+ * Stack space used when we detect a bad kernel stack pointer, and
+ * early in SMP boots before relocation is enabled.
+ */
+static void __init emergency_stack_init(void)
+{
+ unsigned long limit;
+ unsigned int i;
+
+ /*
+ * Emergency stacks must be under 256MB, we cannot afford to take
+ * SLB misses on them. The ABI also requires them to be 128-byte
+ * aligned.
+ *
+ * Since we use these as temporary stacks during secondary CPU
+ * bringup, we need to get at them in real mode. This means they
+ * must also be within the RMO region.
+ */
+ limit = min(0x10000000UL, lmb.rmo_size);
+
+ for_each_cpu(i)
+ paca[i].emergency_sp = __va(lmb_alloc_base(PAGE_SIZE, 128,
+ limit)) + PAGE_SIZE;
+}
+
/*
* Called into from start_kernel, after lock_kernel has been called.
* Initializes bootmem, which is unsed to manage page allocation until
extern int panic_timeout;
extern void do_init_bootmem(void);
- calibrate_delay = ppc64_calibrate_delay;
-
ppc64_boot_msg(0x12, "Setup Arch");
-#ifdef CONFIG_XMON
- if (strstr(cmd_line, "xmon")) {
- /* ensure xmon is enabled */
- xmon_init();
- debugger(0);
- }
-#endif /* CONFIG_XMON */
+ *cmdline_p = cmd_line;
/*
* Set cache line size based on type of cpu as a default.
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;
-
irqstack_early_init();
+ emergency_stack_init();
/* set up the bootmem stuff with available memory */
do_init_bootmem();
+ /* Select the correct idle loop for the platform. */
+ idle_setup();
+
ppc_md.setup_arch();
paging_init();
ppc64_boot_msg(0x15, "Setup Done");
}
+
/* ToDo: do something useful if ppc_md is not yet setup. */
#define PPC64_LINUX_FUNCTION 0x0f000000
#define PPC64_IPL_MESSAGE 0xc0000000
__setup("spread_lpevents=", set_spread_lpevents );
__setup("decr_overclock_proc0=", set_decr_overclock_proc0 );
__setup("decr_overclock=", set_decr_overclock );
+
+#ifdef CONFIG_XMON
+static int __init early_xmon(char *p)
+{
+ /* ensure xmon is enabled */
+ xmon_init();
+ debugger(0);
+
+ return 0;
+}
+early_param("xmon", early_xmon);
+#endif
+
git://git.onelab.eu / linux-2.6.git / blobdiff