#include <linux/kexec.h>
#include <linux/debugfs.h>
#include <linux/irq.h>
+#include <linux/lmb.h>
#include <asm/prom.h>
#include <asm/rtas.h>
-#include <asm/lmb.h>
#include <asm/page.h>
#include <asm/processor.h>
#include <asm/irq.h>
#include <asm/machdep.h>
#include <asm/pSeries_reconfig.h>
#include <asm/pci-bridge.h>
+#include <asm/phyp_dump.h>
#include <asm/kexec.h>
-#include <asm/system.h>
+#include <mm/mmu_decl.h>
#ifdef DEBUG
#define DBG(fmt...) printk(KERN_ERR fmt)
#define DBG(fmt...)
#endif
-
-static int __initdata dt_root_addr_cells;
-static int __initdata dt_root_size_cells;
-
#ifdef CONFIG_PPC64
int __initdata iommu_is_off;
int __initdata iommu_force_on;
unsigned long tce_alloc_start, tce_alloc_end;
#endif
-typedef u32 cell_t;
-
-#if 0
-static struct boot_param_header *initial_boot_params __initdata;
-#else
-struct boot_param_header *initial_boot_params;
-#endif
-
-extern struct device_node *allnodes; /* temporary while merging */
-
extern rwlock_t devtree_lock; /* temporary while merging */
/* export that to outside world */
struct device_node *of_chosen;
-static inline char *find_flat_dt_string(u32 offset)
-{
- return ((char *)initial_boot_params) +
- initial_boot_params->off_dt_strings + offset;
-}
-
-/**
- * This function is used to scan the flattened device-tree, it is
- * used to extract the memory informations at boot before we can
- * unflatten the tree
- */
-int __init of_scan_flat_dt(int (*it)(unsigned long node,
- const char *uname, int depth,
- void *data),
- void *data)
-{
- unsigned long p = ((unsigned long)initial_boot_params) +
- initial_boot_params->off_dt_struct;
- int rc = 0;
- int depth = -1;
-
- do {
- u32 tag = *((u32 *)p);
- char *pathp;
-
- p += 4;
- if (tag == OF_DT_END_NODE) {
- depth --;
- continue;
- }
- if (tag == OF_DT_NOP)
- continue;
- if (tag == OF_DT_END)
- break;
- if (tag == OF_DT_PROP) {
- u32 sz = *((u32 *)p);
- p += 8;
- if (initial_boot_params->version < 0x10)
- p = _ALIGN(p, sz >= 8 ? 8 : 4);
- p += sz;
- p = _ALIGN(p, 4);
- continue;
- }
- if (tag != OF_DT_BEGIN_NODE) {
- printk(KERN_WARNING "Invalid tag %x scanning flattened"
- " device tree !\n", tag);
- return -EINVAL;
- }
- depth++;
- pathp = (char *)p;
- p = _ALIGN(p + strlen(pathp) + 1, 4);
- if ((*pathp) == '/') {
- char *lp, *np;
- for (lp = NULL, np = pathp; *np; np++)
- if ((*np) == '/')
- lp = np+1;
- if (lp != NULL)
- pathp = lp;
- }
- rc = it(p, pathp, depth, data);
- if (rc != 0)
- break;
- } while(1);
-
- 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
- */
-void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
- unsigned long *size)
-{
- unsigned long p = node;
-
- do {
- u32 tag = *((u32 *)p);
- u32 sz, noff;
- const char *nstr;
-
- p += 4;
- if (tag == OF_DT_NOP)
- continue;
- if (tag != OF_DT_PROP)
- return NULL;
-
- sz = *((u32 *)p);
- noff = *((u32 *)(p + 4));
- p += 8;
- if (initial_boot_params->version < 0x10)
- p = _ALIGN(p, sz >= 8 ? 8 : 4);
-
- nstr = find_flat_dt_string(noff);
- if (nstr == NULL) {
- printk(KERN_WARNING "Can't find property index"
- " name !\n");
- return NULL;
- }
- if (strcmp(name, nstr) == 0) {
- if (size)
- *size = sz;
- return (void *)p;
- }
- p += sz;
- p = _ALIGN(p, 4);
- } 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)
-{
- void *res;
-
- *mem = _ALIGN(*mem, align);
- res = (void *)*mem;
- *mem += size;
-
- return res;
-}
-
-static unsigned long __init unflatten_dt_node(unsigned long mem,
- unsigned long *p,
- struct device_node *dad,
- struct device_node ***allnextpp,
- unsigned long fpsize)
-{
- struct device_node *np;
- struct property *pp, **prev_pp = NULL;
- char *pathp;
- u32 tag;
- unsigned int l, allocl;
- int has_name = 0;
- int new_format = 0;
-
- tag = *((u32 *)(*p));
- if (tag != OF_DT_BEGIN_NODE) {
- printk("Weird tag at start of node: %x\n", tag);
- return mem;
- }
- *p += 4;
- pathp = (char *)*p;
- l = allocl = strlen(pathp) + 1;
- *p = _ALIGN(*p + l, 4);
-
- /* version 0x10 has a more compact unit name here instead of the full
- * path. we accumulate the full path size using "fpsize", we'll rebuild
- * it later. We detect this because the first character of the name is
- * not '/'.
- */
- if ((*pathp) != '/') {
- new_format = 1;
- if (fpsize == 0) {
- /* root node: special case. fpsize accounts for path
- * plus terminating zero. root node only has '/', so
- * fpsize should be 2, but we want to avoid the first
- * level nodes to have two '/' so we use fpsize 1 here
- */
- fpsize = 1;
- allocl = 2;
- } else {
- /* account for '/' and path size minus terminal 0
- * already in 'l'
- */
- fpsize += l;
- allocl = fpsize;
- }
- }
-
-
- np = unflatten_dt_alloc(&mem, sizeof(struct device_node) + allocl,
- __alignof__(struct device_node));
- if (allnextpp) {
- memset(np, 0, sizeof(*np));
- np->full_name = ((char*)np) + sizeof(struct device_node);
- if (new_format) {
- char *p = np->full_name;
- /* rebuild full path for new format */
- if (dad && dad->parent) {
- strcpy(p, dad->full_name);
-#ifdef DEBUG
- if ((strlen(p) + l + 1) != allocl) {
- DBG("%s: p: %d, l: %d, a: %d\n",
- pathp, (int)strlen(p), l, allocl);
- }
-#endif
- p += strlen(p);
- }
- *(p++) = '/';
- memcpy(p, pathp, l);
- } else
- memcpy(np->full_name, pathp, l);
- prev_pp = &np->properties;
- **allnextpp = np;
- *allnextpp = &np->allnext;
- if (dad != NULL) {
- np->parent = dad;
- /* we temporarily use the next field as `last_child'*/
- if (dad->next == 0)
- dad->child = np;
- else
- dad->next->sibling = np;
- dad->next = np;
- }
- kref_init(&np->kref);
- }
- while(1) {
- u32 sz, noff;
- char *pname;
-
- tag = *((u32 *)(*p));
- if (tag == OF_DT_NOP) {
- *p += 4;
- continue;
- }
- if (tag != OF_DT_PROP)
- break;
- *p += 4;
- sz = *((u32 *)(*p));
- noff = *((u32 *)((*p) + 4));
- *p += 8;
- if (initial_boot_params->version < 0x10)
- *p = _ALIGN(*p, sz >= 8 ? 8 : 4);
-
- pname = find_flat_dt_string(noff);
- if (pname == NULL) {
- printk("Can't find property name in list !\n");
- break;
- }
- if (strcmp(pname, "name") == 0)
- has_name = 1;
- l = strlen(pname) + 1;
- pp = unflatten_dt_alloc(&mem, sizeof(struct property),
- __alignof__(struct property));
- if (allnextpp) {
- if (strcmp(pname, "linux,phandle") == 0) {
- np->node = *((u32 *)*p);
- if (np->linux_phandle == 0)
- np->linux_phandle = np->node;
- }
- if (strcmp(pname, "ibm,phandle") == 0)
- np->linux_phandle = *((u32 *)*p);
- pp->name = pname;
- pp->length = sz;
- pp->value = (void *)*p;
- *prev_pp = pp;
- prev_pp = &pp->next;
- }
- *p = _ALIGN((*p) + sz, 4);
- }
- /* with version 0x10 we may not have the name property, recreate
- * it here from the unit name if absent
- */
- if (!has_name) {
- char *p = pathp, *ps = pathp, *pa = NULL;
- int sz;
-
- while (*p) {
- if ((*p) == '@')
- pa = p;
- if ((*p) == '/')
- ps = p + 1;
- p++;
- }
- if (pa < ps)
- pa = p;
- sz = (pa - ps) + 1;
- pp = unflatten_dt_alloc(&mem, sizeof(struct property) + sz,
- __alignof__(struct property));
- if (allnextpp) {
- pp->name = "name";
- pp->length = sz;
- pp->value = pp + 1;
- *prev_pp = pp;
- prev_pp = &pp->next;
- memcpy(pp->value, ps, sz - 1);
- ((char *)pp->value)[sz - 1] = 0;
- DBG("fixed up name for %s -> %s\n", pathp,
- (char *)pp->value);
- }
- }
- if (allnextpp) {
- *prev_pp = NULL;
- np->name = of_get_property(np, "name", NULL);
- np->type = of_get_property(np, "device_type", NULL);
-
- if (!np->name)
- np->name = "<NULL>";
- if (!np->type)
- np->type = "<NULL>";
- }
- while (tag == OF_DT_BEGIN_NODE) {
- mem = unflatten_dt_node(mem, p, np, allnextpp, fpsize);
- tag = *((u32 *)(*p));
- }
- if (tag != OF_DT_END_NODE) {
- printk("Weird tag at end of node: %x\n", tag);
- return mem;
- }
- *p += 4;
- 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);
+ DBG("memory limit = 0x%llx\n", (unsigned long long)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.
+/**
+ * move_device_tree - move tree to an unused area, if needed.
+ *
+ * The device tree may be allocated beyond our memory limit, or inside the
+ * crash kernel region for kdump. If so, move it out of the way.
*/
-static void move_device_tree(void)
+static void __init move_device_tree(void)
{
unsigned long start, size;
void *p;
DBG("<- move_device_tree\n");
}
-/**
- * unflattens the device-tree passed by the firmware, creating the
- * tree of struct device_node. It also fills the "name" and "type"
- * pointers of the nodes so the normal device-tree walking functions
- * can be used (this used to be done by finish_device_tree)
- */
-void __init unflatten_device_tree(void)
-{
- unsigned long start, mem, size;
- struct device_node **allnextp = &allnodes;
-
- DBG(" -> unflatten_device_tree()\n");
-
- /* First pass, scan for size */
- start = ((unsigned long)initial_boot_params) +
- initial_boot_params->off_dt_struct;
- size = unflatten_dt_node(0, &start, NULL, NULL, 0);
- size = (size | 3) + 1;
-
- DBG(" size is %lx, allocating...\n", size);
-
- /* Allocate memory for the expanded device tree */
- mem = lmb_alloc(size + 4, __alignof__(struct device_node));
- mem = (unsigned long) __va(mem);
-
- ((u32 *)mem)[size / 4] = 0xdeadbeef;
-
- DBG(" unflattening %lx...\n", mem);
-
- /* Second pass, do actual unflattening */
- start = ((unsigned long)initial_boot_params) +
- initial_boot_params->off_dt_struct;
- unflatten_dt_node(mem, &start, NULL, &allnextp, 0);
- if (*((u32 *)start) != OF_DT_END)
- printk(KERN_WARNING "Weird tag at end of tree: %08x\n", *((u32 *)start));
- if (((u32 *)mem)[size / 4] != 0xdeadbeef)
- printk(KERN_WARNING "End of tree marker overwritten: %08x\n",
- ((u32 *)mem)[size / 4] );
- *allnextp = NULL;
-
- /* Get pointer to OF "/chosen" node for use everywhere */
- of_chosen = of_find_node_by_path("/chosen");
- if (of_chosen == NULL)
- of_chosen = of_find_node_by_path("/chosen@0");
-
- 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
{CPU_FTR_CTRL, 0, 0, 3, 0},
{CPU_FTR_NOEXECUTE, 0, 0, 6, 0},
{CPU_FTR_NODSISRALIGN, 0, 1, 1, 1},
-#if 0
- /* put this back once we know how to test if firmware does 64k IO */
{CPU_FTR_CI_LARGE_PAGE, 0, 1, 2, 0},
-#endif
{CPU_FTR_REAL_LE, PPC_FEATURE_TRUE_LE, 5, 0, 0},
};
ibm_pa_features, ARRAY_SIZE(ibm_pa_features));
}
+#ifdef CONFIG_PPC_STD_MMU_64
+static void __init check_cpu_slb_size(unsigned long node)
+{
+ u32 *slb_size_ptr;
+
+ slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL);
+ if (slb_size_ptr != NULL) {
+ mmu_slb_size = *slb_size_ptr;
+ return;
+ }
+ slb_size_ptr = of_get_flat_dt_prop(node, "ibm,slb-size", NULL);
+ if (slb_size_ptr != NULL) {
+ mmu_slb_size = *slb_size_ptr;
+ }
+}
+#else
+#define check_cpu_slb_size(node) do { } while(0)
+#endif
+
static struct feature_property {
const char *name;
u32 min_value;
{"altivec", 0, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC},
{"ibm,vmx", 1, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC},
#endif /* CONFIG_ALTIVEC */
+#ifdef CONFIG_VSX
+ /* Yes, this _really_ is ibm,vmx == 2 to enable VSX */
+ {"ibm,vmx", 2, CPU_FTR_VSX, PPC_FEATURE_HAS_VSX},
+#endif /* CONFIG_VSX */
#ifdef CONFIG_PPC64
{"ibm,dfp", 1, 0, PPC_FEATURE_HAS_DFP},
{"ibm,purr", 1, CPU_FTR_PURR, 0},
#endif /* CONFIG_PPC64 */
};
+#if defined(CONFIG_44x) && defined(CONFIG_PPC_FPU)
+static inline void identical_pvr_fixup(unsigned long node)
+{
+ unsigned int pvr;
+ char *model = of_get_flat_dt_prop(node, "model", NULL);
+
+ /*
+ * Since 440GR(x)/440EP(x) processors have the same pvr,
+ * we check the node path and set bit 28 in the cur_cpu_spec
+ * pvr for EP(x) processor version. This bit is always 0 in
+ * the "real" pvr. Then we call identify_cpu again with
+ * the new logical pvr to enable FPU support.
+ */
+ if (model && strstr(model, "440EP")) {
+ pvr = cur_cpu_spec->pvr_value | 0x8;
+ identify_cpu(0, pvr);
+ DBG("Using logical pvr %x for %s\n", pvr, model);
+ }
+}
+#else
+#define identical_pvr_fixup(node) do { } while(0)
+#endif
+
static void __init check_cpu_feature_properties(unsigned long node)
{
unsigned long i;
prop = of_get_flat_dt_prop(node, "cpu-version", NULL);
if (prop && (*prop & 0xff000000) == 0x0f000000)
identify_cpu(0, *prop);
+
+ identical_pvr_fixup(node);
}
check_cpu_feature_properties(node);
check_cpu_pa_features(node);
+ check_cpu_slb_size(node);
#ifdef CONFIG_PPC_PSERIES
if (nthreads > 1)
return 0;
}
-#ifdef CONFIG_BLK_DEV_INITRD
-static void __init early_init_dt_check_for_initrd(unsigned long node)
-{
- unsigned long l;
- u32 *prop;
-
- DBG("Looking for initrd properties... ");
-
- prop = of_get_flat_dt_prop(node, "linux,initrd-start", &l);
- if (prop) {
- initrd_start = (unsigned long)__va(of_read_ulong(prop, l/4));
-
- prop = of_get_flat_dt_prop(node, "linux,initrd-end", &l);
- if (prop) {
- initrd_end = (unsigned long)
- __va(of_read_ulong(prop, l/4));
- initrd_below_start_ok = 1;
- } else {
- initrd_start = 0;
- }
- }
-
- DBG("initrd_start=0x%lx initrd_end=0x%lx\n", initrd_start, initrd_end);
-}
-#else
-static inline void early_init_dt_check_for_initrd(unsigned long node)
-{
-}
-#endif /* CONFIG_BLK_DEV_INITRD */
-
-static int __init early_init_dt_scan_chosen(unsigned long node,
- const char *uname, int depth, void *data)
+void __init early_init_dt_scan_chosen_arch(unsigned long node)
{
unsigned long *lprop;
- unsigned long l;
- char *p;
-
- DBG("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
-
- if (depth != 1 ||
- (strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
- return 0;
#ifdef CONFIG_PPC64
/* check if iommu is forced on or off */
#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;
+ lprop = of_get_flat_dt_prop(node, "linux,memory-limit", NULL);
+ if (lprop)
+ memory_limit = *lprop;
#ifdef CONFIG_PPC64
- lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-start", NULL);
- if (lprop)
- tce_alloc_start = *lprop;
- lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL);
- if (lprop)
- tce_alloc_end = *lprop;
+ lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-start", NULL);
+ if (lprop)
+ tce_alloc_start = *lprop;
+ lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL);
+ if (lprop)
+ tce_alloc_end = *lprop;
#endif
#ifdef CONFIG_KEXEC
- lprop = (u64*)of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL);
- if (lprop)
- crashk_res.start = *lprop;
+ lprop = of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL);
+ if (lprop)
+ crashk_res.start = *lprop;
- lprop = (u64*)of_get_flat_dt_prop(node, "linux,crashkernel-size", NULL);
- if (lprop)
- crashk_res.end = crashk_res.start + *lprop - 1;
+ lprop = of_get_flat_dt_prop(node, "linux,crashkernel-size", NULL);
+ if (lprop)
+ crashk_res.end = crashk_res.start + *lprop - 1;
#endif
-
- early_init_dt_check_for_initrd(node);
-
- /* 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 (p == NULL || 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;
-}
-
-static int __init early_init_dt_scan_root(unsigned long node,
- const char *uname, int depth, void *data)
-{
- u32 *prop;
-
- if (depth != 0)
- return 0;
-
- prop = of_get_flat_dt_prop(node, "#size-cells", NULL);
- dt_root_size_cells = (prop == NULL) ? 1 : *prop;
- DBG("dt_root_size_cells = %x\n", dt_root_size_cells);
-
- prop = of_get_flat_dt_prop(node, "#address-cells", NULL);
- dt_root_addr_cells = (prop == NULL) ? 2 : *prop;
- DBG("dt_root_addr_cells = %x\n", dt_root_addr_cells);
-
- /* break now */
- return 1;
-}
-
-static unsigned long __init dt_mem_next_cell(int s, cell_t **cellp)
-{
- cell_t *p = *cellp;
-
- *cellp = p + s;
- return of_read_ulong(p, s);
}
#ifdef CONFIG_PPC_PSERIES
*/
static int __init early_init_dt_scan_drconf_memory(unsigned long node)
{
- cell_t *dm, *ls;
- unsigned long l, n;
- unsigned long base, size, lmb_size, flags;
+ __be32 *dm, *ls, *usm;
+ unsigned long l, n, flags;
+ u64 base, size, lmb_size;
+ unsigned int is_kexec_kdump = 0, rngs;
- ls = (cell_t *)of_get_flat_dt_prop(node, "ibm,lmb-size", &l);
- if (ls == NULL || l < dt_root_size_cells * sizeof(cell_t))
+ ls = of_get_flat_dt_prop(node, "ibm,lmb-size", &l);
+ if (ls == NULL || l < dt_root_size_cells * sizeof(__be32))
return 0;
lmb_size = dt_mem_next_cell(dt_root_size_cells, &ls);
- dm = (cell_t *)of_get_flat_dt_prop(node, "ibm,dynamic-memory", &l);
- if (dm == NULL || l < sizeof(cell_t))
+ dm = of_get_flat_dt_prop(node, "ibm,dynamic-memory", &l);
+ if (dm == NULL || l < sizeof(__be32))
return 0;
n = *dm++; /* number of entries */
- if (l < (n * (dt_root_addr_cells + 4) + 1) * sizeof(cell_t))
+ if (l < (n * (dt_root_addr_cells + 4) + 1) * sizeof(__be32))
return 0;
+ /* check if this is a kexec/kdump kernel. */
+ usm = of_get_flat_dt_prop(node, "linux,drconf-usable-memory",
+ &l);
+ if (usm != NULL)
+ is_kexec_kdump = 1;
+
for (; n != 0; --n) {
base = dt_mem_next_cell(dt_root_addr_cells, &dm);
flags = dm[3];
if ((flags & 0x80) || !(flags & 0x8))
continue;
size = lmb_size;
- if (iommu_is_off) {
- if (base >= 0x80000000ul)
+ rngs = 1;
+ if (is_kexec_kdump) {
+ /*
+ * For each lmb in ibm,dynamic-memory, a corresponding
+ * entry in linux,drconf-usable-memory property contains
+ * a counter 'p' followed by 'p' (base, size) duple.
+ * Now read the counter from
+ * linux,drconf-usable-memory property
+ */
+ rngs = dt_mem_next_cell(dt_root_size_cells, &usm);
+ if (!rngs) /* there are no (base, size) duple */
continue;
- if ((base + size) > 0x80000000ul)
- size = 0x80000000ul - base;
}
- lmb_add(base, size);
+ do {
+ if (is_kexec_kdump) {
+ base = dt_mem_next_cell(dt_root_addr_cells,
+ &usm);
+ size = dt_mem_next_cell(dt_root_size_cells,
+ &usm);
+ }
+ if (iommu_is_off) {
+ if (base >= 0x80000000ul)
+ continue;
+ if ((base + size) > 0x80000000ul)
+ size = 0x80000000ul - base;
+ }
+ lmb_add(base, size);
+ } while (--rngs);
}
lmb_dump_all();
return 0;
const char *uname, int depth, void *data)
{
char *type = of_get_flat_dt_prop(node, "device_type", NULL);
- cell_t *reg, *endp;
+ __be32 *reg, *endp;
unsigned long l;
/* Look for the ibm,dynamic-reconfiguration-memory node */
} else if (strcmp(type, "memory") != 0)
return 0;
- reg = (cell_t *)of_get_flat_dt_prop(node, "linux,usable-memory", &l);
+ reg = of_get_flat_dt_prop(node, "linux,usable-memory", &l);
if (reg == NULL)
- reg = (cell_t *)of_get_flat_dt_prop(node, "reg", &l);
+ reg = of_get_flat_dt_prop(node, "reg", &l);
if (reg == NULL)
return 0;
- endp = reg + (l / sizeof(cell_t));
+ endp = reg + (l / sizeof(__be32));
DBG("memory scan node %s, reg size %ld, data: %x %x %x %x,\n",
uname, l, reg[0], reg[1], reg[2], reg[3]);
while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
- unsigned long base, size;
+ u64 base, size;
base = dt_mem_next_cell(dt_root_addr_cells, ®);
size = dt_mem_next_cell(dt_root_size_cells, ®);
if (size == 0)
continue;
- DBG(" - %lx , %lx\n", base, size);
+ DBG(" - %llx , %llx\n", (unsigned long long)base,
+ (unsigned long long)size);
#ifdef CONFIG_PPC64
if (iommu_is_off) {
if (base >= 0x80000000ul)
}
#endif
lmb_add(base, size);
+
+ memstart_addr = min((u64)memstart_addr, base);
}
+
return 0;
}
DBG("reserving: %llx -> %llx\n", base, size);
lmb_reserve(base, size);
}
+}
-#if 0
- DBG("memory reserved, lmbs :\n");
- lmb_dump_all();
-#endif
+#ifdef CONFIG_PHYP_DUMP
+/**
+ * phyp_dump_calculate_reserve_size() - reserve variable boot area 5% or arg
+ *
+ * Function to find the largest size we need to reserve
+ * during early boot process.
+ *
+ * It either looks for boot param and returns that OR
+ * returns larger of 256 or 5% rounded down to multiples of 256MB.
+ *
+ */
+static inline unsigned long phyp_dump_calculate_reserve_size(void)
+{
+ unsigned long tmp;
+
+ if (phyp_dump_info->reserve_bootvar)
+ return phyp_dump_info->reserve_bootvar;
+
+ /* divide by 20 to get 5% of value */
+ tmp = lmb_end_of_DRAM();
+ do_div(tmp, 20);
+
+ /* round it down in multiples of 256 */
+ tmp = tmp & ~0x0FFFFFFFUL;
+
+ return (tmp > PHYP_DUMP_RMR_END ? tmp : PHYP_DUMP_RMR_END);
+}
+
+/**
+ * phyp_dump_reserve_mem() - reserve all not-yet-dumped mmemory
+ *
+ * This routine may reserve memory regions in the kernel only
+ * if the system is supported and a dump was taken in last
+ * boot instance or if the hardware is supported and the
+ * scratch area needs to be setup. In other instances it returns
+ * without reserving anything. The memory in case of dump being
+ * active is freed when the dump is collected (by userland tools).
+ */
+static void __init phyp_dump_reserve_mem(void)
+{
+ unsigned long base, size;
+ unsigned long variable_reserve_size;
+
+ if (!phyp_dump_info->phyp_dump_configured) {
+ printk(KERN_ERR "Phyp-dump not supported on this hardware\n");
+ return;
+ }
+
+ if (!phyp_dump_info->phyp_dump_at_boot) {
+ printk(KERN_INFO "Phyp-dump disabled at boot time\n");
+ return;
+ }
+
+ variable_reserve_size = phyp_dump_calculate_reserve_size();
+
+ if (phyp_dump_info->phyp_dump_is_active) {
+ /* Reserve *everything* above RMR.Area freed by userland tools*/
+ base = variable_reserve_size;
+ size = lmb_end_of_DRAM() - base;
+
+ /* XXX crashed_ram_end is wrong, since it may be beyond
+ * the memory_limit, it will need to be adjusted. */
+ lmb_reserve(base, size);
+
+ phyp_dump_info->init_reserve_start = base;
+ phyp_dump_info->init_reserve_size = size;
+ } else {
+ size = phyp_dump_info->cpu_state_size +
+ phyp_dump_info->hpte_region_size +
+ variable_reserve_size;
+ base = lmb_end_of_DRAM() - size;
+ lmb_reserve(base, size);
+ phyp_dump_info->init_reserve_start = base;
+ phyp_dump_info->init_reserve_size = size;
+ }
}
+#else
+static inline void __init phyp_dump_reserve_mem(void) {}
+#endif /* CONFIG_PHYP_DUMP && CONFIG_PPC_RTAS */
+
void __init early_init_devtree(void *params)
{
+ phys_addr_t limit;
+
DBG(" -> early_init_devtree(%p)\n", params);
/* Setup flat device-tree pointer */
of_scan_flat_dt(early_init_dt_scan_rtas, NULL);
#endif
+#ifdef CONFIG_PHYP_DUMP
+ /* scan tree to see if dump occured during last boot */
+ of_scan_flat_dt(early_init_dt_scan_phyp_dump, NULL);
+#endif
+
/* Retrieve various informations from the /chosen node of the
* device-tree, including the platform type, initrd location and
* size, TCE reserve, and more ...
/* Reserve LMB regions used by kernel, initrd, dt, etc... */
lmb_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START);
+ /* If relocatable, reserve first 32k for interrupt vectors etc. */
+ if (PHYSICAL_START > MEMORY_START)
+ lmb_reserve(MEMORY_START, 0x8000);
reserve_kdump_trampoline();
reserve_crashkernel();
early_reserve_mem();
+ phyp_dump_reserve_mem();
+
+ limit = memory_limit;
+ if (! limit) {
+ phys_addr_t memsize;
+
+ /* Ensure that total memory size is page-aligned, because
+ * otherwise mark_bootmem() gets upset. */
+ lmb_analyze();
+ memsize = lmb_phys_mem_size();
+ if ((memsize & PAGE_MASK) != memsize)
+ limit = memsize & PAGE_MASK;
+ }
+ lmb_enforce_memory_limit(limit);
- lmb_enforce_memory_limit(memory_limit);
lmb_analyze();
+ lmb_dump_all();
- DBG("Phys. mem: %lx\n", lmb_phys_mem_size());
+ DBG("Phys. mem: %llx\n", lmb_phys_mem_size());
/* We may need to relocate the flat tree, do it now.
* FIXME .. and the initrd too? */
DBG(" <- early_init_devtree()\n");
}
-
-/**
- * Indicates whether the root node has a given value in its
- * compatible property.
- */
-int machine_is_compatible(const char *compat)
-{
- struct device_node *root;
- int rc = 0;
-
- root = of_find_node_by_path("/");
- if (root) {
- rc = of_device_is_compatible(root, compat);
- of_node_put(root);
- }
- return rc;
-}
-EXPORT_SYMBOL(machine_is_compatible);
-
/*******
*
* New implementation of the OF "find" APIs, return a refcounted
read_lock(&devtree_lock);
for (np = allnodes; np != 0; np = np->allnext)
- if (np->linux_phandle == handle)
+ if (np->phandle == handle)
break;
of_node_get(np);
read_unlock(&devtree_lock);
EXPORT_SYMBOL(of_find_node_by_phandle);
/**
- * of_find_all_nodes - Get next node in global list
- * @prev: Previous node or NULL to start iteration
- * of_node_put() will be called on it
+ * of_find_next_cache_node - Find a node's subsidiary cache
+ * @np: node of type "cpu" or "cache"
*
* Returns a node pointer with refcount incremented, use
- * of_node_put() on it when done.
- */
-struct device_node *of_find_all_nodes(struct device_node *prev)
-{
- struct device_node *np;
-
- read_lock(&devtree_lock);
- np = prev ? prev->allnext : allnodes;
- for (; np != 0; np = np->allnext)
- if (of_node_get(np))
- break;
- of_node_put(prev);
- read_unlock(&devtree_lock);
- return np;
-}
-EXPORT_SYMBOL(of_find_all_nodes);
-
-/**
- * of_node_get - Increment refcount of a node
- * @node: Node to inc refcount, NULL is supported to
- * simplify writing of callers
- *
- * Returns node.
+ * of_node_put() on it when done. Caller should hold a reference
+ * to np.
*/
-struct device_node *of_node_get(struct device_node *node)
+struct device_node *of_find_next_cache_node(struct device_node *np)
{
- if (node)
- kref_get(&node->kref);
- return node;
-}
-EXPORT_SYMBOL(of_node_get);
+ struct device_node *child;
+ const phandle *handle;
-static inline struct device_node * kref_to_device_node(struct kref *kref)
-{
- return container_of(kref, struct device_node, kref);
-}
+ handle = of_get_property(np, "l2-cache", NULL);
+ if (!handle)
+ handle = of_get_property(np, "next-level-cache", NULL);
-/**
- * of_node_release - release a dynamically allocated node
- * @kref: kref element of the node to be released
- *
- * In of_node_put() this function is passed to kref_put()
- * as the destructor.
- */
-static void of_node_release(struct kref *kref)
-{
- struct device_node *node = kref_to_device_node(kref);
- struct property *prop = node->properties;
-
- /* We should never be releasing nodes that haven't been detached. */
- if (!of_node_check_flag(node, OF_DETACHED)) {
- printk("WARNING: Bad of_node_put() on %s\n", node->full_name);
- dump_stack();
- kref_init(&node->kref);
- return;
- }
-
- if (!of_node_check_flag(node, OF_DYNAMIC))
- return;
+ if (handle)
+ return of_find_node_by_phandle(*handle);
- while (prop) {
- struct property *next = prop->next;
- kfree(prop->name);
- kfree(prop->value);
- kfree(prop);
- prop = next;
-
- if (!prop) {
- prop = node->deadprops;
- node->deadprops = NULL;
- }
- }
- kfree(node->full_name);
- kfree(node->data);
- kfree(node);
-}
+ /* OF on pmac has nodes instead of properties named "l2-cache"
+ * beneath CPU nodes.
+ */
+ if (!strcmp(np->type, "cpu"))
+ for_each_child_of_node(np, child)
+ if (!strcmp(child->type, "cache"))
+ return child;
-/**
- * of_node_put - Decrement refcount of a node
- * @node: Node to dec refcount, NULL is supported to
- * simplify writing of callers
- *
- */
-void of_node_put(struct device_node *node)
-{
- if (node)
- kref_put(&node->kref, of_node_release);
+ return NULL;
}
-EXPORT_SYMBOL(of_node_put);
/*
* Plug a device node into the tree and global list.
*/
void of_attach_node(struct device_node *np)
{
- write_lock(&devtree_lock);
+ unsigned long flags;
+
+ write_lock_irqsave(&devtree_lock, flags);
np->sibling = np->parent->child;
np->allnext = allnodes;
np->parent->child = np;
allnodes = np;
- write_unlock(&devtree_lock);
+ write_unlock_irqrestore(&devtree_lock, flags);
}
/*
void of_detach_node(struct device_node *np)
{
struct device_node *parent;
+ unsigned long flags;
- write_lock(&devtree_lock);
+ write_lock_irqsave(&devtree_lock, flags);
parent = np->parent;
if (!parent)
of_node_set_flag(np, OF_DETACHED);
out_unlock:
- write_unlock(&devtree_lock);
+ write_unlock_irqrestore(&devtree_lock, flags);
}
#ifdef CONFIG_PPC_PSERIES
if (machine_is(powermac))
return -ENODEV;
- /* fix up new node's linux_phandle field */
+ /* fix up new node's phandle field */
if ((ibm_phandle = of_get_property(node, "ibm,phandle", NULL)))
- node->linux_phandle = *ibm_phandle;
+ node->phandle = *ibm_phandle;
out:
of_node_put(parent);
__initcall(prom_reconfig_setup);
#endif
-/*
- * Add a property to a node
- */
-int prom_add_property(struct device_node* np, struct property* prop)
-{
- struct property **next;
-
- prop->next = NULL;
- write_lock(&devtree_lock);
- next = &np->properties;
- while (*next) {
- if (strcmp(prop->name, (*next)->name) == 0) {
- /* duplicate ! don't insert it */
- write_unlock(&devtree_lock);
- return -1;
- }
- next = &(*next)->next;
- }
- *next = prop;
- write_unlock(&devtree_lock);
-
-#ifdef CONFIG_PROC_DEVICETREE
- /* try to add to proc as well if it was initialized */
- if (np->pde)
- proc_device_tree_add_prop(np->pde, prop);
-#endif /* CONFIG_PROC_DEVICETREE */
-
- return 0;
-}
-
-/*
- * Remove a property from a node. Note that we don't actually
- * remove it, since we have given out who-knows-how-many pointers
- * to the data using get-property. Instead we just move the property
- * to the "dead properties" list, so it won't be found any more.
- */
-int prom_remove_property(struct device_node *np, struct property *prop)
-{
- struct property **next;
- int found = 0;
-
- write_lock(&devtree_lock);
- next = &np->properties;
- while (*next) {
- if (*next == prop) {
- /* found the node */
- *next = prop->next;
- prop->next = np->deadprops;
- np->deadprops = prop;
- found = 1;
- break;
- }
- next = &(*next)->next;
- }
- write_unlock(&devtree_lock);
-
- if (!found)
- return -ENODEV;
-
-#ifdef CONFIG_PROC_DEVICETREE
- /* try to remove the proc node as well */
- if (np->pde)
- proc_device_tree_remove_prop(np->pde, prop);
-#endif /* CONFIG_PROC_DEVICETREE */
-
- return 0;
-}
-
-/*
- * Update a property in a node. Note that we don't actually
- * remove it, since we have given out who-knows-how-many pointers
- * to the data using get-property. Instead we just move the property
- * to the "dead properties" list, and add the new property to the
- * property list
- */
-int prom_update_property(struct device_node *np,
- struct property *newprop,
- struct property *oldprop)
-{
- struct property **next;
- int found = 0;
-
- write_lock(&devtree_lock);
- next = &np->properties;
- while (*next) {
- if (*next == oldprop) {
- /* found the node */
- newprop->next = oldprop->next;
- *next = newprop;
- oldprop->next = np->deadprops;
- np->deadprops = oldprop;
- found = 1;
- break;
- }
- next = &(*next)->next;
- }
- write_unlock(&devtree_lock);
-
- if (!found)
- return -ENODEV;
-
-#ifdef CONFIG_PROC_DEVICETREE
- /* try to add to proc as well if it was initialized */
- if (np->pde)
- proc_device_tree_update_prop(np->pde, newprop, oldprop);
-#endif /* CONFIG_PROC_DEVICETREE */
-
- return 0;
-}
-
-
/* Find the device node for a given logical cpu number, also returns the cpu
* local thread number (index in ibm,interrupt-server#s) if relevant and
* asked for (non NULL)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff