#include <asm/machdep.h>
#include <asm/pSeries_reconfig.h>
#include <asm/pci-bridge.h>
+#include <asm/kexec.h>
#ifdef DEBUG
#define DBG(fmt...) printk(KERN_ERR fmt)
static int __initdata dt_root_size_cells;
#ifdef CONFIG_PPC64
-static int __initdata iommu_is_off;
+int __initdata iommu_is_off;
int __initdata iommu_force_on;
unsigned long tce_alloc_start, tce_alloc_end;
#endif
/* Apple uses bits in there in a different way, let's
* only keep the real sense bit on macs
*/
- if (_machine == PLATFORM_POWERMAC)
+ if (machine_is(powermac))
sense &= 0x1;
np->intrs[intrcount].sense = map_mpic_senses[sense];
}
#ifdef CONFIG_PPC64
/* We offset irq numbers for the u3 MPIC by 128 in PowerMac */
- if (_machine == PLATFORM_POWERMAC && ic && ic->parent) {
+ if (machine_is(powermac) && ic && ic->parent) {
char *name = get_property(ic->parent, "name", NULL);
if (name && !strcmp(name, "u3"))
np->intrs[intrcount].line += 128;
return rc;
}
+unsigned long __init of_get_flat_dt_root(void)
+{
+ unsigned long p = ((unsigned long)initial_boot_params) +
+ initial_boot_params->off_dt_struct;
+
+ while(*((u32 *)p) == OF_DT_NOP)
+ p += 4;
+ BUG_ON (*((u32 *)p) != OF_DT_BEGIN_NODE);
+ p += 4;
+ return _ALIGN(p + strlen((char *)p) + 1, 4);
+}
+
/**
* This function can be used within scan_flattened_dt callback to get
* access to properties
} while(1);
}
+int __init of_flat_dt_is_compatible(unsigned long node, const char *compat)
+{
+ const char* cp;
+ unsigned long cplen, l;
+
+ cp = of_get_flat_dt_prop(node, "compatible", &cplen);
+ if (cp == NULL)
+ return 0;
+ while (cplen > 0) {
+ if (strncasecmp(cp, compat, strlen(compat)) == 0)
+ return 1;
+ l = strlen(cp) + 1;
+ cp += l;
+ cplen -= l;
+ }
+
+ return 0;
+}
+
static void *__init unflatten_dt_alloc(unsigned long *mem, unsigned long size,
unsigned long align)
{
#ifdef DEBUG
if ((strlen(p) + l + 1) != allocl) {
DBG("%s: p: %d, l: %d, a: %d\n",
- pathp, strlen(p), l, allocl);
+ pathp, (int)strlen(p), l, allocl);
}
#endif
p += strlen(p);
return mem;
}
+static int __init early_parse_mem(char *p)
+{
+ if (!p)
+ return 1;
+
+ memory_limit = PAGE_ALIGN(memparse(p, &p));
+ DBG("memory limit = 0x%lx\n", memory_limit);
+
+ return 0;
+}
+early_param("mem", early_parse_mem);
+
+/*
+ * The device tree may be allocated below our memory limit, or inside the
+ * crash kernel region for kdump. If so, move it out now.
+ */
+static void move_device_tree(void)
+{
+ unsigned long start, size;
+ void *p;
+
+ DBG("-> move_device_tree\n");
+
+ start = __pa(initial_boot_params);
+ size = initial_boot_params->totalsize;
+
+ if ((memory_limit && (start + size) > memory_limit) ||
+ overlaps_crashkernel(start, size)) {
+ p = __va(lmb_alloc_base(size, PAGE_SIZE, lmb.rmo_size));
+ memcpy(p, initial_boot_params, size);
+ initial_boot_params = (struct boot_param_header *)p;
+ DBG("Moved device tree to 0x%p\n", p);
+ }
+
+ DBG("<- move_device_tree\n");
+}
/**
* unflattens the device-tree passed by the firmware, creating the
{
unsigned long start, mem, size;
struct device_node **allnextp = &allnodes;
- char *p = NULL;
- int l = 0;
DBG(" -> unflatten_device_tree()\n");
/* Allocate memory for the expanded device tree */
mem = lmb_alloc(size + 4, __alignof__(struct device_node));
- if (!mem) {
- DBG("Couldn't allocate memory with lmb_alloc()!\n");
- panic("Couldn't allocate memory with lmb_alloc()!\n");
- }
mem = (unsigned long) __va(mem);
((u32 *)mem)[size / 4] = 0xdeadbeef;
if (of_chosen == NULL)
of_chosen = of_find_node_by_path("/chosen@0");
- /* Retreive command line */
- if (of_chosen != NULL) {
- p = (char *)get_property(of_chosen, "bootargs", &l);
- if (p != NULL && l > 0)
- strlcpy(cmd_line, p, min(l, COMMAND_LINE_SIZE));
+ DBG(" <- unflatten_device_tree()\n");
+}
+
+/*
+ * ibm,pa-features is a per-cpu property that contains a string of
+ * attribute descriptors, each of which has a 2 byte header plus up
+ * to 254 bytes worth of processor attribute bits. First header
+ * byte specifies the number of bytes following the header.
+ * Second header byte is an "attribute-specifier" type, of which
+ * zero is the only currently-defined value.
+ * Implementation: Pass in the byte and bit offset for the feature
+ * that we are interested in. The function will return -1 if the
+ * pa-features property is missing, or a 1/0 to indicate if the feature
+ * is supported/not supported. Note that the bit numbers are
+ * big-endian to match the definition in PAPR.
+ */
+static struct ibm_pa_feature {
+ unsigned long cpu_features; /* CPU_FTR_xxx bit */
+ unsigned int cpu_user_ftrs; /* PPC_FEATURE_xxx bit */
+ unsigned char pabyte; /* byte number in ibm,pa-features */
+ unsigned char pabit; /* bit number (big-endian) */
+ unsigned char invert; /* if 1, pa bit set => clear feature */
+} ibm_pa_features[] __initdata = {
+ {0, PPC_FEATURE_HAS_MMU, 0, 0, 0},
+ {0, PPC_FEATURE_HAS_FPU, 0, 1, 0},
+ {CPU_FTR_SLB, 0, 0, 2, 0},
+ {CPU_FTR_CTRL, 0, 0, 3, 0},
+ {CPU_FTR_NOEXECUTE, 0, 0, 6, 0},
+ {CPU_FTR_NODSISRALIGN, 0, 1, 1, 1},
+ {CPU_FTR_CI_LARGE_PAGE, 0, 1, 2, 0},
+};
+
+static void __init check_cpu_pa_features(unsigned long node)
+{
+ unsigned char *pa_ftrs;
+ unsigned long len, tablelen, i, bit;
+
+ pa_ftrs = of_get_flat_dt_prop(node, "ibm,pa-features", &tablelen);
+ if (pa_ftrs == NULL)
+ return;
+
+ /* find descriptor with type == 0 */
+ for (;;) {
+ if (tablelen < 3)
+ return;
+ len = 2 + pa_ftrs[0];
+ if (tablelen < len)
+ return; /* descriptor 0 not found */
+ if (pa_ftrs[1] == 0)
+ break;
+ tablelen -= len;
+ pa_ftrs += len;
}
-#ifdef CONFIG_CMDLINE
- if (l == 0 || (l == 1 && (*p) == 0))
- strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
-#endif /* CONFIG_CMDLINE */
- DBG("Command line is: %s\n", cmd_line);
+ /* loop over bits we know about */
+ for (i = 0; i < ARRAY_SIZE(ibm_pa_features); ++i) {
+ struct ibm_pa_feature *fp = &ibm_pa_features[i];
- DBG(" <- unflatten_device_tree()\n");
+ if (fp->pabyte >= pa_ftrs[0])
+ continue;
+ bit = (pa_ftrs[2 + fp->pabyte] >> (7 - fp->pabit)) & 1;
+ if (bit ^ fp->invert) {
+ cur_cpu_spec->cpu_features |= fp->cpu_features;
+ cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftrs;
+ } else {
+ cur_cpu_spec->cpu_features &= ~fp->cpu_features;
+ cur_cpu_spec->cpu_user_features &= ~fp->cpu_user_ftrs;
+ }
+ }
}
-
static int __init early_init_dt_scan_cpus(unsigned long node,
- const char *uname, int depth, void *data)
+ const char *uname, int depth,
+ void *data)
{
+ static int logical_cpuid = 0;
+ char *type = of_get_flat_dt_prop(node, "device_type", NULL);
+#ifdef CONFIG_ALTIVEC
u32 *prop;
- unsigned long size;
- char *type = of_get_flat_dt_prop(node, "device_type", &size);
+#endif
+ u32 *intserv;
+ int i, nthreads;
+ unsigned long len;
+ int found = 0;
/* We are scanning "cpu" nodes only */
if (type == NULL || strcmp(type, "cpu") != 0)
return 0;
- boot_cpuid = 0;
- boot_cpuid_phys = 0;
- if (initial_boot_params && initial_boot_params->version >= 2) {
- /* version 2 of the kexec param format adds the phys cpuid
- * of booted proc.
- */
- boot_cpuid_phys = initial_boot_params->boot_cpuid_phys;
+ /* Get physical cpuid */
+ intserv = of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s", &len);
+ if (intserv) {
+ nthreads = len / sizeof(int);
} else {
- /* Check if it's the boot-cpu, set it's hw index now */
- if (of_get_flat_dt_prop(node,
+ intserv = of_get_flat_dt_prop(node, "reg", NULL);
+ nthreads = 1;
+ }
+
+ /*
+ * Now see if any of these threads match our boot cpu.
+ * NOTE: This must match the parsing done in smp_setup_cpu_maps.
+ */
+ for (i = 0; i < nthreads; i++) {
+ /*
+ * version 2 of the kexec param format adds the phys cpuid of
+ * booted proc.
+ */
+ if (initial_boot_params && initial_boot_params->version >= 2) {
+ if (intserv[i] ==
+ initial_boot_params->boot_cpuid_phys) {
+ found = 1;
+ break;
+ }
+ } else {
+ /*
+ * Check if it's the boot-cpu, set it's hw index now,
+ * unfortunately this format did not support booting
+ * off secondary threads.
+ */
+ if (of_get_flat_dt_prop(node,
"linux,boot-cpu", NULL) != NULL) {
- prop = of_get_flat_dt_prop(node, "reg", NULL);
- if (prop != NULL)
- boot_cpuid_phys = *prop;
+ found = 1;
+ break;
+ }
}
+
+#ifdef CONFIG_SMP
+ /* logical cpu id is always 0 on UP kernels */
+ logical_cpuid++;
+#endif
+ }
+
+ if (found) {
+ DBG("boot cpu: logical %d physical %d\n", logical_cpuid,
+ intserv[i]);
+ boot_cpuid = logical_cpuid;
+ set_hard_smp_processor_id(boot_cpuid, intserv[i]);
}
- set_hard_smp_processor_id(0, boot_cpuid_phys);
#ifdef CONFIG_ALTIVEC
/* Check if we have a VMX and eventually update CPU features */
}
#endif /* CONFIG_ALTIVEC */
+ check_cpu_pa_features(node);
+
#ifdef CONFIG_PPC_PSERIES
- /*
- * Check for an SMT capable CPU and set the CPU feature. We do
- * this by looking at the size of the ibm,ppc-interrupt-server#s
- * property
- */
- prop = (u32 *)of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s",
- &size);
- cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT;
- if (prop && ((size / sizeof(u32)) > 1))
+ if (nthreads > 1)
cur_cpu_spec->cpu_features |= CPU_FTR_SMT;
+ else
+ cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT;
#endif
return 0;
static int __init early_init_dt_scan_chosen(unsigned long node,
const char *uname, int depth, void *data)
{
- u32 *prop;
unsigned long *lprop;
+ unsigned long l;
+ char *p;
DBG("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
(strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
return 0;
- /* get platform type */
- prop = (u32 *)of_get_flat_dt_prop(node, "linux,platform", NULL);
- if (prop == NULL)
- return 0;
-#ifdef CONFIG_PPC_MULTIPLATFORM
- _machine = *prop;
-#endif
-
#ifdef CONFIG_PPC64
/* check if iommu is forced on or off */
if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL)
iommu_force_on = 1;
#endif
+ /* mem=x on the command line is the preferred mechanism */
lprop = of_get_flat_dt_prop(node, "linux,memory-limit", NULL);
if (lprop)
memory_limit = *lprop;
* set of RTAS infos now if available
*/
{
- u64 *basep, *entryp;
+ u64 *basep, *entryp, *sizep;
basep = of_get_flat_dt_prop(node, "linux,rtas-base", NULL);
entryp = of_get_flat_dt_prop(node, "linux,rtas-entry", NULL);
- prop = of_get_flat_dt_prop(node, "linux,rtas-size", NULL);
- if (basep && entryp && prop) {
+ sizep = of_get_flat_dt_prop(node, "linux,rtas-size", NULL);
+ if (basep && entryp && sizep) {
rtas.base = *basep;
rtas.entry = *entryp;
- rtas.size = *prop;
+ rtas.size = *sizep;
}
}
#endif /* CONFIG_PPC_RTAS */
crashk_res.end = crashk_res.start + *lprop - 1;
#endif
+ /* Retreive command line */
+ p = of_get_flat_dt_prop(node, "bootargs", &l);
+ if (p != NULL && l > 0)
+ strlcpy(cmd_line, p, min((int)l, COMMAND_LINE_SIZE));
+
+#ifdef CONFIG_CMDLINE
+ if (l == 0 || (l == 1 && (*p) == 0))
+ strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+#endif /* CONFIG_CMDLINE */
+
+ DBG("Command line is: %s\n", cmd_line);
+
/* break now */
return 1;
}
reserve_map = (u64 *)(((unsigned long)initial_boot_params) +
initial_boot_params->off_mem_rsvmap);
+
+ /* before we do anything, lets reserve the dt blob */
+ lmb_reserve(__pa((unsigned long)initial_boot_params),
+ initial_boot_params->totalsize);
+
#ifdef CONFIG_PPC32
/*
* Handle the case where we might be booting from an old kexec
size_32 = *(reserve_map_32++);
if (size_32 == 0)
break;
- DBG("reserving: %lx -> %lx\n", base_32, size_32);
+ DBG("reserving: %x -> %x\n", base_32, size_32);
lmb_reserve(base_32, size_32);
}
return;
lmb_init();
of_scan_flat_dt(early_init_dt_scan_root, NULL);
of_scan_flat_dt(early_init_dt_scan_memory, NULL);
- lmb_enforce_memory_limit(memory_limit);
- lmb_analyze();
- DBG("Phys. mem: %lx\n", lmb_phys_mem_size());
+ /* Save command line for /proc/cmdline and then parse parameters */
+ strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
+ parse_early_param();
/* Reserve LMB regions used by kernel, initrd, dt, etc... */
lmb_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START);
-#ifdef CONFIG_CRASH_DUMP
- lmb_reserve(0, KDUMP_RESERVE_LIMIT);
-#endif
+ reserve_kdump_trampoline();
+ reserve_crashkernel();
early_reserve_mem();
+ lmb_enforce_memory_limit(memory_limit);
+ lmb_analyze();
+
+ DBG("Phys. mem: %lx\n", lmb_phys_mem_size());
+
+ /* We may need to relocate the flat tree, do it now.
+ * FIXME .. and the initrd too? */
+ move_device_tree();
+
DBG("Scanning CPUs ...\n");
/* Retreive CPU related informations from the flat tree
/* We don't support that function on PowerMac, at least
* not yet
*/
- if (_machine == PLATFORM_POWERMAC)
+ if (machine_is(powermac))
return -ENODEV;
/* fix up new node's linux_phandle field */
return 0;
}
-#ifdef CONFIG_KEXEC
-/* We may have allocated the flat device tree inside the crash kernel region
- * in prom_init. If so we need to move it out into regular memory. */
-void kdump_move_device_tree(void)
-{
- unsigned long start, end;
- struct boot_param_header *new;
-
- start = __pa((unsigned long)initial_boot_params);
- end = start + initial_boot_params->totalsize;
-
- if (end < crashk_res.start || start > crashk_res.end)
- return;
-
- new = (struct boot_param_header*)
- __va(lmb_alloc(initial_boot_params->totalsize, PAGE_SIZE));
-
- memcpy(new, initial_boot_params, initial_boot_params->totalsize);
-
- initial_boot_params = new;
-
- DBG("Flat device tree blob moved to %p\n", initial_boot_params);
-
- /* XXX should we unreserve the old DT? */
-}
-#endif /* CONFIG_KEXEC */
projects / karo-tx-linux.git / blobdiff