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ppc64.c
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/* ppc64.c -- core analysis suite
*
* Copyright (C) 2004-2014 David Anderson
* Copyright (C) 2004-2014 Red Hat, Inc. All rights reserved.
* Copyright (C) 2004, 2006 Haren Myneni, IBM Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifdef PPC64
#include "defs.h"
static int ppc64_kvtop(struct task_context *, ulong, physaddr_t *, int);
static int ppc64_uvtop(struct task_context *, ulong, physaddr_t *, int);
static ulong ppc64_vmalloc_start(void);
static int ppc64_vmemmap_to_phys(ulong, physaddr_t *, int);
static int ppc64_is_task_addr(ulong);
static int ppc64_verify_symbol(const char *, ulong, char);
static ulong ppc64_get_task_pgd(ulong);
static int ppc64_translate_pte(ulong, void *, ulonglong);
static ulong ppc64_processor_speed(void);
static int ppc64_eframe_search(struct bt_info *);
static void ppc64_back_trace_cmd(struct bt_info *);
static void ppc64_back_trace(struct gnu_request *, struct bt_info *);
static void get_ppc64_frame(struct bt_info *, ulong *, ulong *);
static void ppc64_print_stack_entry(int,struct gnu_request *,
ulong, ulong, struct bt_info *);
static void ppc64_dump_irq(int);
static ulong ppc64_get_sp(ulong);
static void ppc64_get_stack_frame(struct bt_info *, ulong *, ulong *);
static int ppc64_dis_filter(ulong, char *, unsigned int);
static void ppc64_cmd_mach(void);
static int ppc64_get_smp_cpus(void);
static void ppc64_display_machine_stats(void);
static void ppc64_dump_line_number(ulong);
static struct line_number_hook ppc64_line_number_hooks[];
static ulong ppc64_get_stackbase(ulong);
static ulong ppc64_get_stacktop(ulong);
void ppc64_compiler_warning_stub(void);
static ulong ppc64_in_irqstack(ulong);
static char * ppc64_check_eframe(struct ppc64_pt_regs *);
static void ppc64_print_eframe(char *, struct ppc64_pt_regs *,
struct bt_info *);
static void parse_cmdline_args(void);
static int ppc64_paca_init(int);
static void ppc64_init_cpu_info(void);
static int ppc64_get_cpu_map(void);
static void ppc64_clear_machdep_cache(void);
static void ppc64_vmemmap_init(void);
static int ppc64_get_kvaddr_ranges(struct vaddr_range *);
static uint get_ptetype(ulong pte);
static int is_hugepage(ulong pte);
static int is_hugepd(ulong pte);
static ulong hugepage_dir(ulong pte);
static inline uint get_ptetype(ulong pte)
{
uint pte_type = 0; /* 0: regular entry; 1: huge pte; 2: huge pd */
if (is_hugepage(pte))
pte_type = 1;
else if (is_hugepd(pte))
pte_type = 2;
return pte_type;
}
static int is_hugepage(ulong pte)
{
/*
* leaf pte for huge page, bottom two bits != 00
*/
return ((pte & HUGE_PTE_MASK) != 0x0);
}
static inline int is_hugepd(ulong pte)
{
if (THIS_KERNEL_VERSION >= LINUX(3,10,0)) {
/*
* hugepd pointer, bottom two bits == 00 and next 4 bits
* indicate size of table
*/
return (((pte & HUGE_PTE_MASK) == 0x0) &&
((pte & HUGEPD_SHIFT_MASK) != 0));
} else
return ((pte & PD_HUGE) == 0x0);
}
static inline ulong hugepage_dir(ulong pte)
{
if (THIS_KERNEL_VERSION >= LINUX(3,10,0))
return (ulong)(pte & ~HUGEPD_SHIFT_MASK);
else
return (ulong)((pte & ~HUGEPD_SHIFT_MASK) | PD_HUGE);
}
static int book3e_is_kvaddr(ulong addr)
{
return (addr >= BOOK3E_VMBASE);
}
static int book3e_is_vmaddr(ulong addr)
{
return (addr >= BOOK3E_VMBASE) && (addr < machdep->identity_map_base);
}
static int ppc64_is_vmaddr(ulong addr)
{
return (vt->vmalloc_start && addr >= vt->vmalloc_start);
}
struct machine_specific ppc64_machine_specific = {
.hwintrstack = { 0 },
.hwstackbuf = 0,
.hwstacksize = 0,
.pte_shift = PTE_SHIFT,
._page_present = 0x1UL,
._page_user = 0x2UL,
._page_rw = 0x4UL,
._page_guarded = 0x8UL,
._page_coherent = 0x10UL,
._page_no_cache = 0x20UL,
._page_writethru = 0x40UL,
._page_dirty = 0x80UL,
._page_accessed = 0x100UL,
.is_kvaddr = generic_is_kvaddr,
.is_vmaddr = ppc64_is_vmaddr,
};
struct machine_specific book3e_machine_specific = {
.hwintrstack = { 0 },
.hwstackbuf = 0,
.hwstacksize = 0,
.pte_shift = PTE_SHIFT_L4_BOOK3E_64K,
._page_present = 0x1UL,
._page_user = 0xCUL,
._page_rw = 0x30UL,
._page_guarded = 0x100000UL,
._page_coherent = 0x200000UL,
._page_no_cache = 0x400000UL,
._page_writethru = 0x800000UL,
._page_dirty = 0x1000UL,
._page_accessed = 0x40000UL,
.is_kvaddr = book3e_is_kvaddr,
.is_vmaddr = book3e_is_vmaddr,
};
/*
* Do all necessary machine-specific setup here. This is called several
* times during initialization.
*/
void
ppc64_init(int when)
{
#if defined(__x86_64__)
if (ACTIVE())
error(FATAL, "compiled for the PPC64 architecture\n");
#endif
switch (when)
{
case PRE_SYMTAB:
machdep->machspec = &ppc64_machine_specific;
machdep->verify_symbol = ppc64_verify_symbol;
if (pc->flags & KERNEL_DEBUG_QUERY)
return;
machdep->stacksize = PPC64_STACK_SIZE;
machdep->last_pgd_read = 0;
machdep->last_pmd_read = 0;
machdep->last_ptbl_read = 0;
machdep->machspec->last_level4_read = 0;
machdep->verify_paddr = generic_verify_paddr;
machdep->ptrs_per_pgd = PTRS_PER_PGD;
machdep->flags |= MACHDEP_BT_TEXT;
if (machdep->cmdline_args[0])
parse_cmdline_args();
machdep->clear_machdep_cache = ppc64_clear_machdep_cache;
break;
case PRE_GDB:
/*
* Recently there were changes made to kexec tools
* to support 64K page size. With those changes
* vmcore file obtained from a kernel which supports
* 64K page size cannot be analyzed using crash on a
* machine running with kernel supporting 4K page size
*
* The following modifications are required in crash
* tool to be in sync with kexec tools.
*
* Look if the following symbol exists. If yes then
* the dump was taken with a kernel supporting 64k
* page size. So change the page size accordingly.
*
* Also moved the following code block from
* PRE_SYMTAB case here.
*/
if (symbol_exists("interrupt_base_book3e")) {
machdep->machspec = &book3e_machine_specific;
machdep->flags |= BOOK3E;
machdep->kvbase = BOOK3E_VMBASE;
} else
machdep->kvbase = symbol_value("_stext");
if (symbol_exists("__hash_page_64K"))
machdep->pagesize = PPC64_64K_PAGE_SIZE;
else
machdep->pagesize = memory_page_size();
machdep->pageshift = ffs(machdep->pagesize) - 1;
machdep->pageoffset = machdep->pagesize - 1;
machdep->pagemask = ~((ulonglong)machdep->pageoffset);
if ((machdep->pgd = (char *)malloc(PAGESIZE())) == NULL)
error(FATAL, "cannot malloc pgd space.");
if ((machdep->pmd = (char *)malloc(PAGESIZE())) == NULL)
error(FATAL, "cannot malloc pmd space.");
if ((machdep->ptbl = (char *)malloc(PAGESIZE())) == NULL)
error(FATAL, "cannot malloc ptbl space.");
if ((machdep->machspec->level4 = (char *)malloc(PAGESIZE())) == NULL)
error(FATAL, "cannot malloc level4 space.");
machdep->identity_map_base = symbol_value("_stext");
machdep->is_kvaddr = machdep->machspec->is_kvaddr;
machdep->is_uvaddr = generic_is_uvaddr;
machdep->eframe_search = ppc64_eframe_search;
machdep->back_trace = ppc64_back_trace_cmd;
machdep->processor_speed = ppc64_processor_speed;
machdep->uvtop = ppc64_uvtop;
machdep->kvtop = ppc64_kvtop;
machdep->get_task_pgd = ppc64_get_task_pgd;
machdep->get_stack_frame = ppc64_get_stack_frame;
machdep->get_stackbase = ppc64_get_stackbase;
machdep->get_stacktop = ppc64_get_stacktop;
machdep->translate_pte = ppc64_translate_pte;
machdep->memory_size = generic_memory_size;
machdep->is_task_addr = ppc64_is_task_addr;
machdep->dis_filter = ppc64_dis_filter;
machdep->cmd_mach = ppc64_cmd_mach;
machdep->get_smp_cpus = ppc64_get_smp_cpus;
machdep->line_number_hooks = ppc64_line_number_hooks;
machdep->value_to_symbol = generic_machdep_value_to_symbol;
machdep->get_kvaddr_ranges = ppc64_get_kvaddr_ranges;
machdep->init_kernel_pgd = NULL;
if (symbol_exists("vmemmap_populate")) {
machdep->flags |= VMEMMAP;
machdep->machspec->vmemmap_base =
VMEMMAP_REGION_ID << REGION_SHIFT;
}
machdep->get_irq_affinity = generic_get_irq_affinity;
machdep->show_interrupts = generic_show_interrupts;
break;
case POST_GDB:
if (!(machdep->flags & (VM_ORIG|VM_4_LEVEL))) {
if (THIS_KERNEL_VERSION >= LINUX(2,6,14)) {
machdep->flags |= VM_4_LEVEL;
} else {
machdep->flags |= VM_ORIG;
}
}
if (machdep->flags & VM_ORIG) {
/* pre-2.6.14 layout */
free(machdep->machspec->level4);
machdep->machspec->level4 = NULL;
machdep->ptrs_per_pgd = PTRS_PER_PGD;
} else {
/* 2.6.14 layout */
struct machine_specific *m = machdep->machspec;
if (machdep->pagesize == 65536) {
/* 64K pagesize */
if (THIS_KERNEL_VERSION >= LINUX(3,10,0)) {
m->l1_index_size = PTE_INDEX_SIZE_L4_64K_3_10;
m->l2_index_size = PMD_INDEX_SIZE_L4_64K_3_10;
m->l3_index_size = PUD_INDEX_SIZE_L4_64K;
m->l4_index_size = PGD_INDEX_SIZE_L4_64K_3_10;
} else {
m->l1_index_size = PTE_INDEX_SIZE_L4_64K;
m->l2_index_size = PMD_INDEX_SIZE_L4_64K;
m->l3_index_size = PUD_INDEX_SIZE_L4_64K;
m->l4_index_size = PGD_INDEX_SIZE_L4_64K;
}
if (!(machdep->flags & BOOK3E))
m->pte_shift = symbol_exists("demote_segment_4k") ?
PTE_SHIFT_L4_64K_V2 : PTE_SHIFT_L4_64K_V1;
m->l2_masked_bits = PMD_MASKED_BITS_64K;
} else {
/* 4K pagesize */
m->l1_index_size = PTE_INDEX_SIZE_L4_4K;
m->l2_index_size = PMD_INDEX_SIZE_L4_4K;
m->l3_index_size = PUD_INDEX_SIZE_L4_4K;
m->l4_index_size = PGD_INDEX_SIZE_L4_4K;
m->pte_shift = (machdep->flags & BOOK3E) ?
PTE_SHIFT_L4_BOOK3E_4K : PTE_SHIFT_L4_4K;
m->l2_masked_bits = PMD_MASKED_BITS_4K;
}
/* Compute ptrs per each level */
m->l1_shift = machdep->pageshift;
m->ptrs_per_l1 = (1 << m->l1_index_size);
m->ptrs_per_l2 = (1 << m->l2_index_size);
m->ptrs_per_l3 = (1 << m->l3_index_size);
machdep->ptrs_per_pgd = m->ptrs_per_l3;
/* Compute shifts */
m->l2_shift = m->l1_shift + m->l1_index_size;
m->l3_shift = m->l2_shift + m->l2_index_size;
m->l4_shift = m->l3_shift + m->l3_index_size;
}
if (machdep->flags & VMEMMAP)
ppc64_vmemmap_init();
machdep->section_size_bits = _SECTION_SIZE_BITS;
if (THIS_KERNEL_VERSION >= LINUX(3,7,0))
machdep->max_physmem_bits = _MAX_PHYSMEM_BITS_3_7;
else
machdep->max_physmem_bits = _MAX_PHYSMEM_BITS;
ppc64_init_cpu_info();
machdep->vmalloc_start = ppc64_vmalloc_start;
MEMBER_OFFSET_INIT(thread_struct_pg_tables,
"thread_struct", "pg_tables");
STRUCT_SIZE_INIT(irqdesc, "irqdesc");
STRUCT_SIZE_INIT(irq_desc_t, "irq_desc_t");
if (INVALID_SIZE(irqdesc) && INVALID_SIZE(irq_desc_t))
STRUCT_SIZE_INIT(irq_desc_t, "irq_desc");
/* as of 2.3.x PPC uses the generic irq handlers */
if (VALID_SIZE(irq_desc_t))
machdep->dump_irq = generic_dump_irq;
else {
machdep->dump_irq = ppc64_dump_irq;
MEMBER_OFFSET_INIT(irqdesc_action, "irqdesc", "action");
MEMBER_OFFSET_INIT(irqdesc_ctl, "irqdesc", "ctl");
MEMBER_OFFSET_INIT(irqdesc_level, "irqdesc", "level");
}
MEMBER_OFFSET_INIT(device_node_type, "device_node", "type");
MEMBER_OFFSET_INIT(device_node_allnext,
"device_node", "allnext");
MEMBER_OFFSET_INIT(device_node_properties,
"device_node", "properties");
MEMBER_OFFSET_INIT(property_name, "property", "name");
MEMBER_OFFSET_INIT(property_value, "property", "value");
MEMBER_OFFSET_INIT(property_next, "property", "next");
MEMBER_OFFSET_INIT(machdep_calls_setup_residual,
"machdep_calls", "setup_residual");
MEMBER_OFFSET_INIT(RESIDUAL_VitalProductData,
"RESIDUAL", "VitalProductData");
MEMBER_OFFSET_INIT(VPD_ProcessorHz, "VPD", "ProcessorHz");
MEMBER_OFFSET_INIT(bd_info_bi_intfreq, "bd_info", "bi_intfreq");
if (symbol_exists("irq_desc"))
ARRAY_LENGTH_INIT(machdep->nr_irqs, irq_desc,
"irq_desc", NULL, 0);
else if (kernel_symbol_exists("nr_irqs"))
get_symbol_data("nr_irqs", sizeof(unsigned int),
&machdep->nr_irqs);
else
machdep->nr_irqs = 0;
if (symbol_exists("paca") &&
MEMBER_EXISTS("paca_struct", "xHrdIntStack")) {
ulong paca_sym, offset;
uint cpu, paca_size = STRUCT_SIZE("paca_struct");
/*
* Get the HW Interrupt stack base and top values.
* Note that, this stack will be used to store frames
* when the CPU received IPI (only for 2.4 kernel).
* Hence it is needed to retrieve IPI symbols
* (Ex: smp_message_recv, xics_ipi_action, and etc)
* and to get the top SP in the process's stack.
*/
offset = MEMBER_OFFSET("paca_struct", "xHrdIntStack");
paca_sym = symbol_value("paca");
for (cpu = 0; cpu < kt->cpus; cpu++) {
readmem(paca_sym + (paca_size * cpu) + offset,
KVADDR,
&machdep->machspec->hwintrstack[cpu],
sizeof(ulong), "PPC64 HW_intr_stack",
FAULT_ON_ERROR);
}
machdep->machspec->hwstacksize = 8 * machdep->pagesize;
if ((machdep->machspec->hwstackbuf = (char *)
malloc(machdep->machspec->hwstacksize)) == NULL)
error(FATAL, "cannot malloc hwirqstack space.");
} else
/*
* 'xHrdIntStack' member in "paca_struct" is not
* available for 2.6 kernel.
*/
BZERO(&machdep->machspec->hwintrstack,
NR_CPUS*sizeof(ulong));
if (!machdep->hz) {
machdep->hz = HZ;
if (THIS_KERNEL_VERSION >= LINUX(2,6,0))
machdep->hz = 1000;
}
/*
* IRQ stacks are introduced in 2.6 and also configurable.
*/
if ((THIS_KERNEL_VERSION >= LINUX(2,6,0)) &&
symbol_exists("hardirq_ctx"))
ASSIGN_SIZE(irq_ctx) = STACKSIZE();
break;
case POST_INIT:
break;
case LOG_ONLY:
machdep->kvbase = kt->vmcoreinfo._stext_SYMBOL;
break;
}
}
#ifndef KSYMS_START
#define KSYMS_START 1
#endif
static ulong
ppc64_task_to_stackbase(ulong task)
{
if (tt->flags & THREAD_INFO)
return task_to_thread_info(task);
else
return task;
}
static ulong
ppc64_get_stackbase(ulong task)
{
return ppc64_task_to_stackbase(task);
}
static ulong
ppc64_get_stacktop(ulong task)
{
return ppc64_task_to_stackbase(task) + STACKSIZE();
}
void
ppc64_dump_machdep_table(ulong arg)
{
int i, c, others;
others = 0;
fprintf(fp, " flags: %lx (", machdep->flags);
if (machdep->flags & KSYMS_START)
fprintf(fp, "%sKSYMS_START", others++ ? "|" : "");
if (machdep->flags & MACHDEP_BT_TEXT)
fprintf(fp, "%sMACHDEP_BT_TEXT", others++ ? "|" : "");
if (machdep->flags & VM_ORIG)
fprintf(fp, "%sVM_ORIG", others++ ? "|" : "");
if (machdep->flags & VM_4_LEVEL)
fprintf(fp, "%sVM_4_LEVEL", others++ ? "|" : "");
if (machdep->flags & VMEMMAP)
fprintf(fp, "%sVMEMMAP", others++ ? "|" : "");
if (machdep->flags & VMEMMAP_AWARE)
fprintf(fp, "%sVMEMMAP_AWARE", others++ ? "|" : "");
fprintf(fp, ")\n");
fprintf(fp, " kvbase: %lx\n", machdep->kvbase);
fprintf(fp, " identity_map_base: %lx\n", machdep->identity_map_base);
fprintf(fp, " pagesize: %d\n", machdep->pagesize);
fprintf(fp, " pageshift: %d\n", machdep->pageshift);
fprintf(fp, " pagemask: %llx\n", machdep->pagemask);
fprintf(fp, " pageoffset: %lx\n", machdep->pageoffset);
fprintf(fp, " stacksize: %ld\n", machdep->stacksize);
fprintf(fp, " hz: %d\n", machdep->hz);
fprintf(fp, " mhz: %ld\n", machdep->mhz);
fprintf(fp, " memsize: %ld (0x%lx)\n",
machdep->memsize, machdep->memsize);
fprintf(fp, " bits: %d\n", machdep->bits);
fprintf(fp, " nr_irqs: %d\n", machdep->nr_irqs);
fprintf(fp, " eframe_search: ppc64_eframe_search()\n");
fprintf(fp, " back_trace: ppc64_back_trace_cmd()\n");
fprintf(fp, " processor_speed: ppc64_processor_speed()\n");
fprintf(fp, " uvtop: ppc64_uvtop()\n");
fprintf(fp, " kvtop: ppc64_kvtop()\n");
fprintf(fp, " get_task_pgd: ppc64_get_task_pgd()\n");
fprintf(fp, " dump_irq: ppc64_dump_irq()\n");
fprintf(fp, " get_stack_frame: ppc64_get_stack_frame()\n");
fprintf(fp, " get_stackbase: ppc64_get_stackbase()\n");
fprintf(fp, " get_stacktop: ppc64_get_stacktop()\n");
fprintf(fp, " translate_pte: ppc64_translate_pte()\n");
fprintf(fp, " memory_size: generic_memory_size()\n");
fprintf(fp, " vmalloc_start: ppc64_vmalloc_start()\n");
fprintf(fp, " is_task_addr: ppc64_is_task_addr()\n");
fprintf(fp, " verify_symbol: ppc64_verify_symbol()\n");
fprintf(fp, " dis_filter: ppc64_dis_filter()\n");
fprintf(fp, " cmd_mach: ppc64_cmd_mach()\n");
fprintf(fp, " get_smp_cpus: ppc64_get_smp_cpus()\n");
fprintf(fp, " is_kvaddr: %s\n",
machdep->is_kvaddr == book3e_is_kvaddr ?
"book3e_is_kvaddr()" : "generic_is_kvaddr()");
fprintf(fp, " is_uvaddr: generic_is_uvaddr()\n");
fprintf(fp, " verify_paddr: generic_verify_paddr()\n");
fprintf(fp, " get_kvaddr_ranges: ppc64_get_kvaddr_ranges()\n");
fprintf(fp, " get_irq_affinity: generic_get_irq_affinity()\n");
fprintf(fp, " show_interrupts: generic_show_interrupts()\n");
fprintf(fp, " xendump_p2m_create: NULL\n");
fprintf(fp, "xen_kdump_p2m_create: NULL\n");
fprintf(fp, " line_number_hooks: ppc64_line_number_hooks\n");
fprintf(fp, " last_pgd_read: %lx\n", machdep->last_pgd_read);
fprintf(fp, " last_pmd_read: %lx\n", machdep->last_pmd_read);
fprintf(fp, " last_ptbl_read: %lx\n", machdep->last_ptbl_read);
fprintf(fp, "clear_machdep_cache: ppc64_clear_machdep_cache()\n");
fprintf(fp, " pgd: %lx\n", (ulong)machdep->pgd);
fprintf(fp, " pmd: %lx\n", (ulong)machdep->pmd);
fprintf(fp, " ptbl: %lx\n", (ulong)machdep->ptbl);
fprintf(fp, " ptrs_per_pgd: %d\n", machdep->ptrs_per_pgd);
fprintf(fp, " section_size_bits: %ld\n", machdep->section_size_bits);
fprintf(fp, " max_physmem_bits: %ld\n", machdep->max_physmem_bits);
fprintf(fp, " sections_per_root: %ld\n", machdep->sections_per_root);
for (i = 0; i < MAX_MACHDEP_ARGS; i++) {
fprintf(fp, " cmdline_args[%d]: %s\n",
i, machdep->cmdline_args[i] ?
machdep->cmdline_args[i] : "(unused)");
}
fprintf(fp, " machspec: %lx\n", (ulong)machdep->machspec);
fprintf(fp, " is_kvaddr: %s\n",
machdep->machspec->is_kvaddr == book3e_is_kvaddr ?
"book3e_is_kvaddr()" : "generic_is_kvaddr()");
fprintf(fp, " is_vmaddr: %s\n",
machdep->machspec->is_vmaddr == book3e_is_vmaddr ?
"book3e_is_vmaddr()" : "ppc64_is_vmaddr()");
fprintf(fp, " hwintrstack[%d]: ", NR_CPUS);
for (c = 0; c < NR_CPUS; c++) {
for (others = 0, i = c; i < NR_CPUS; i++) {
if (machdep->machspec->hwintrstack[i])
others++;
}
if (!others) {
fprintf(fp, "%s%s",
c && ((c % 4) == 0) ? "\n " : "",
c ? "(remainder unused)" : "(unused)");
break;
}
fprintf(fp, "%s%016lx ",
((c % 4) == 0) ? "\n " : "",
machdep->machspec->hwintrstack[c]);
}
fprintf(fp, "\n");
fprintf(fp, " hwstackbuf: %lx\n", (ulong)machdep->machspec->hwstackbuf);
fprintf(fp, " hwstacksize: %d\n", machdep->machspec->hwstacksize);
fprintf(fp, " level4: %lx\n", (ulong)machdep->machspec->level4);
fprintf(fp, " last_level4_read: %lx\n", (ulong)machdep->machspec->last_level4_read);
fprintf(fp, " l4_index_size: %d\n", machdep->machspec->l4_index_size);
fprintf(fp, " l3_index_size: %d\n", machdep->machspec->l3_index_size);
fprintf(fp, " l2_index_size: %d\n", machdep->machspec->l2_index_size);
fprintf(fp, " l1_index_size: %d\n", machdep->machspec->l1_index_size);
fprintf(fp, " ptrs_per_l3: %d\n", machdep->machspec->ptrs_per_l3);
fprintf(fp, " ptrs_per_l2: %d\n", machdep->machspec->ptrs_per_l2);
fprintf(fp, " ptrs_per_l1: %d\n", machdep->machspec->ptrs_per_l1);
fprintf(fp, " l4_shift: %d\n", machdep->machspec->l4_shift);
fprintf(fp, " l3_shift: %d\n", machdep->machspec->l3_shift);
fprintf(fp, " l2_shift: %d\n", machdep->machspec->l2_shift);
fprintf(fp, " l1_shift: %d\n", machdep->machspec->l1_shift);
fprintf(fp, " pte_shift: %d\n", machdep->machspec->pte_shift);
fprintf(fp, " l2_masked_bits: %x\n", machdep->machspec->l2_masked_bits);
fprintf(fp, " vmemmap_base: ");
if (machdep->machspec->vmemmap_base)
fprintf(fp, "%lx\n", machdep->machspec->vmemmap_base);
else
fprintf(fp, "(unused)\n");
if (machdep->machspec->vmemmap_cnt) {
fprintf(fp, " vmemmap_cnt: %d\n",
machdep->machspec->vmemmap_cnt);
fprintf(fp, " vmemmap_psize: %d\n",
machdep->machspec->vmemmap_psize);
for (i = 0; i < machdep->machspec->vmemmap_cnt; i++) {
fprintf(fp,
" vmemmap_list[%d]: virt: %lx phys: %lx\n", i,
machdep->machspec->vmemmap_list[i].virt,
machdep->machspec->vmemmap_list[i].phys);
}
} else {
fprintf(fp, " vmemmap_cnt: (unused)\n");
fprintf(fp, " vmemmap_page_size: (unused)\n");
fprintf(fp, " vmemmap_list[]: (unused)\n");
}
}
/*
* Virtual to physical memory translation. This function will be called
* by both ppc64_kvtop and ppc64_uvtop.
*/
static int
ppc64_vtop(ulong vaddr, ulong *pgd, physaddr_t *paddr, int verbose)
{
ulong *page_dir;
ulong *page_middle;
ulong *page_table;
ulong pgd_pte, pmd_pte;
ulong pte;
if (verbose)
fprintf(fp, "PAGE DIRECTORY: %lx\n", (ulong)pgd);
if (THIS_KERNEL_VERSION < LINUX(2,6,0))
page_dir = (ulong *)((uint *)pgd + PGD_OFFSET_24(vaddr));
else
page_dir = (ulong *)((uint *)pgd + PGD_OFFSET(vaddr));
FILL_PGD(PAGEBASE(pgd), KVADDR, PAGESIZE());
pgd_pte = UINT(machdep->pgd + PAGEOFFSET(page_dir));
if (verbose)
fprintf(fp, " PGD: %lx => %lx\n", (ulong)page_dir, pgd_pte);
if (!pgd_pte)
return FALSE;
pgd_pte <<= PAGESHIFT();
page_middle = (ulong *)((uint *)pgd_pte + PMD_OFFSET(vaddr));
FILL_PMD(PTOV(PAGEBASE(pgd_pte)), KVADDR, PAGESIZE());
pmd_pte = UINT(machdep->pmd + PAGEOFFSET(page_middle));
if (verbose)
fprintf(fp, " PMD: %lx => %lx\n", (ulong)page_middle, pmd_pte);
if (!(pmd_pte))
return FALSE;
if (THIS_KERNEL_VERSION < LINUX(2,6,0))
pmd_pte <<= PAGESHIFT();
else
pmd_pte = ((pmd_pte << PAGESHIFT()) >> PMD_TO_PTEPAGE_SHIFT);
page_table = (ulong *)pmd_pte + (BTOP(vaddr) & (PTRS_PER_PTE - 1));
if (verbose)
fprintf(fp, " PMD: %lx => %lx\n",(ulong)page_middle,
(ulong)page_table);
FILL_PTBL(PTOV(PAGEBASE(pmd_pte)), KVADDR, PAGESIZE());
pte = ULONG(machdep->ptbl + PAGEOFFSET(page_table));
if (verbose)
fprintf(fp, " PTE: %lx => %lx\n", (ulong)page_table, pte);
if (!(pte & _PAGE_PRESENT)) {
if (pte && verbose) {
fprintf(fp, "\n");
ppc64_translate_pte(pte, 0, PTE_SHIFT);
}
return FALSE;
}
if (!pte)
return FALSE;
*paddr = PAGEBASE(PTOB(pte >> PTE_SHIFT)) + PAGEOFFSET(vaddr);
if (verbose) {
fprintf(fp, " PAGE: %lx\n\n", PAGEBASE(*paddr));
ppc64_translate_pte(pte, 0, PTE_SHIFT);
}
return TRUE;
}
/*
* Virtual to physical memory translation. This function will be called
* by both ppc64_kvtop and ppc64_uvtop.
*/
static int
ppc64_vtop_level4(ulong vaddr, ulong *level4, physaddr_t *paddr, int verbose)
{
ulong *level4_dir;
ulong *page_dir;
ulong *page_middle;
ulong *page_table;
ulong level4_pte, pgd_pte, pmd_pte;
ulong pte;
uint hugepage_type = 0; /* 0: regular entry; 1: huge pte; 2: huge pd */
if (verbose)
fprintf(fp, "PAGE DIRECTORY: %lx\n", (ulong)level4);
level4_dir = (ulong *)((ulong *)level4 + L4_OFFSET(vaddr));
FILL_L4(PAGEBASE(level4), KVADDR, PAGESIZE());
level4_pte = ULONG(machdep->machspec->level4 + PAGEOFFSET(level4_dir));
if (verbose)
fprintf(fp, " L4: %lx => %lx\n", (ulong)level4_dir, level4_pte);
if (!level4_pte)
return FALSE;
hugepage_type = get_ptetype(level4_pte);
if (hugepage_type) {
pte = level4_pte;
goto out;
}
/* Sometimes we don't have level3 pagetable entries */
if (machdep->machspec->l3_index_size != 0) {
page_dir = (ulong *)((ulong *)level4_pte + PGD_OFFSET_L4(vaddr));
FILL_PGD(PAGEBASE(level4_pte), KVADDR, PAGESIZE());
pgd_pte = ULONG(machdep->pgd + PAGEOFFSET(page_dir));
if (verbose)
fprintf(fp, " PGD: %lx => %lx\n", (ulong)page_dir, pgd_pte);
if (!pgd_pte)
return FALSE;
hugepage_type = get_ptetype(pgd_pte);
if (hugepage_type) {
pte = pgd_pte;
goto out;
}
} else {
pgd_pte = level4_pte;
}
page_middle = (ulong *)((ulong *)pgd_pte + PMD_OFFSET_L4(vaddr));
FILL_PMD(PAGEBASE(pgd_pte), KVADDR, PAGESIZE());
pmd_pte = ULONG(machdep->pmd + PAGEOFFSET(page_middle));
if (verbose)
fprintf(fp, " PMD: %lx => %lx\n", (ulong)page_middle, pmd_pte);
if (!(pmd_pte))
return FALSE;
hugepage_type = get_ptetype(pmd_pte);
if (hugepage_type) {
pte = pmd_pte;
goto out;
}
page_table = (ulong *)(pmd_pte & ~(machdep->machspec->l2_masked_bits))
+ (BTOP(vaddr) & (machdep->machspec->ptrs_per_l1 - 1));
if (verbose)
fprintf(fp, " PMD: %lx => %lx\n",(ulong)page_middle,
(ulong)page_table);
FILL_PTBL(PAGEBASE(pmd_pte), KVADDR, PAGESIZE());
pte = ULONG(machdep->ptbl + PAGEOFFSET(page_table));
if (verbose)
fprintf(fp, " PTE: %lx => %lx\n", (ulong)page_table, pte);
if (!(pte & _PAGE_PRESENT)) {
if (pte && verbose) {
fprintf(fp, "\n");
ppc64_translate_pte(pte, 0, machdep->machspec->pte_shift);
}
return FALSE;
}
if (!pte)
return FALSE;
out:
if (hugepage_type) {
if (hugepage_type == 2) {
/* TODO: Calculate the offset within the huge page
* directory for this huge page to get corresponding
* physical address. In the current form, it may
* return the physical address of the first huge page
* in this directory for all the huge pages
* in this huge page directory.
*/
readmem(hugepage_dir(pte), KVADDR, &pte, sizeof(pte),
"hugepd_entry", RETURN_ON_ERROR);
}
/* TODO: get page offset for huge pages based on page size */
*paddr = PAGEBASE(PTOB(pte >> machdep->machspec->pte_shift));
} else {
*paddr = PAGEBASE(PTOB(pte >> machdep->machspec->pte_shift))
+ PAGEOFFSET(vaddr);
}
if (verbose) {
if (hugepage_type)
fprintf(fp, " HUGE PAGE: %lx\n\n", PAGEBASE(*paddr));
else
fprintf(fp, " PAGE: %lx\n\n", PAGEBASE(*paddr));
ppc64_translate_pte(pte, 0, machdep->machspec->pte_shift);
}
return TRUE;
}
/*
* Translates a user virtual address to its physical address. cmd_vtop()
* sets the verbose flag so that the pte translation gets displayed; all
* other callers quietly accept the translation.
*
* This routine can also take mapped kernel virtual addresses if the -u flag
* was passed to cmd_vtop(). If so, it makes the translation using the
* kernel-memory PGD entry instead of swapper_pg_dir.
*/
static int
ppc64_uvtop(struct task_context *tc, ulong vaddr,
physaddr_t *paddr, int verbose)
{
ulong mm, active_mm;
ulong *pgd;
if (!tc)
error(FATAL, "current context invalid\n");
*paddr = 0;
if (is_kernel_thread(tc->task) && IS_KVADDR(vaddr)) {
if (VALID_MEMBER(thread_struct_pg_tables))
pgd = (ulong *)machdep->get_task_pgd(tc->task);
else {
if (INVALID_MEMBER(task_struct_active_mm))
error(FATAL, "no pg_tables or active_mm?\n");
readmem(tc->task + OFFSET(task_struct_active_mm),
KVADDR, &active_mm, sizeof(void *),
"task active_mm contents", FAULT_ON_ERROR);
if (!active_mm)
error(FATAL,
"no active_mm for this kernel thread\n");
readmem(active_mm + OFFSET(mm_struct_pgd),
KVADDR, &pgd, sizeof(long),
"mm_struct pgd", FAULT_ON_ERROR);
}
} else {
if ((mm = task_mm(tc->task, TRUE)))
pgd = ULONG_PTR(tt->mm_struct +
OFFSET(mm_struct_pgd));
else
readmem(tc->mm_struct + OFFSET(mm_struct_pgd),
KVADDR, &pgd, sizeof(long), "mm_struct pgd",
FAULT_ON_ERROR);
}
if (machdep->flags & VM_4_LEVEL)
return ppc64_vtop_level4(vaddr, pgd, paddr, verbose);
else
return ppc64_vtop(vaddr, pgd, paddr, verbose);
}
/*
* Translates a kernel virtual address to its physical address. cmd_vtop()
* sets the verbose flag so that the pte translation gets displayed; all
* other callers quietly accept the translation.
*/
static int
ppc64_kvtop(struct task_context *tc, ulong kvaddr,
physaddr_t *paddr, int verbose)
{
if (!IS_KVADDR(kvaddr))
return FALSE;
if ((machdep->flags & VMEMMAP) &&
(kvaddr >= machdep->machspec->vmemmap_base))
return ppc64_vmemmap_to_phys(kvaddr, paddr, verbose);
if (!vt->vmalloc_start) {
*paddr = VTOP(kvaddr);
return TRUE;
}
if (!IS_VMALLOC_ADDR(kvaddr)) {
*paddr = VTOP(kvaddr);
if (!verbose)
return TRUE;
}
if (machdep->flags & VM_4_LEVEL)
return ppc64_vtop_level4(kvaddr, (ulong *)vt->kernel_pgd[0], paddr, verbose);
else
return ppc64_vtop(kvaddr, (ulong *)vt->kernel_pgd[0], paddr, verbose);
}
/*
* Verify that the kernel has made the vmemmap list available,
* and if so, stash the relevant data required to make vtop
* translations.
*/
static
void ppc64_vmemmap_init(void)
{
int i, psize, shift, cnt;
struct list_data list_data, *ld;
long backing_size, virt_addr_offset, phys_offset, list_offset;
ulong *vmemmap_list;
char *vmemmap_buf;
struct machine_specific *ms;
if (!(kernel_symbol_exists("vmemmap_list")) ||
!(kernel_symbol_exists("mmu_psize_defs")) ||
!(kernel_symbol_exists("mmu_vmemmap_psize")) ||
!STRUCT_EXISTS("vmemmap_backing") ||
!STRUCT_EXISTS("mmu_psize_def") ||
!MEMBER_EXISTS("mmu_psize_def", "shift") ||
!MEMBER_EXISTS("vmemmap_backing", "phys") ||
!MEMBER_EXISTS("vmemmap_backing", "virt_addr") ||
!MEMBER_EXISTS("vmemmap_backing", "list"))
return;
ms = machdep->machspec;
backing_size = STRUCT_SIZE("vmemmap_backing");
virt_addr_offset = MEMBER_OFFSET("vmemmap_backing", "virt_addr");
phys_offset = MEMBER_OFFSET("vmemmap_backing", "phys");
list_offset = MEMBER_OFFSET("vmemmap_backing", "list");
if (!readmem(symbol_value("mmu_vmemmap_psize"),
KVADDR, &psize, sizeof(int), "mmu_vmemmap_psize",
RETURN_ON_ERROR))
return;
if (!readmem(symbol_value("mmu_psize_defs") +
(STRUCT_SIZE("mmu_psize_def") * psize) +
MEMBER_OFFSET("mmu_psize_def", "shift"),
KVADDR, &shift, sizeof(int), "mmu_psize_def shift",
RETURN_ON_ERROR))
return;
ms->vmemmap_psize = 1 << shift;
ld = &list_data;
BZERO(ld, sizeof(struct list_data));
if (!readmem(symbol_value("vmemmap_list"),
KVADDR, &ld->start, sizeof(void *), "vmemmap_list",
RETURN_ON_ERROR))
return;
ld->end = symbol_value("vmemmap_list");
ld->list_head_offset = list_offset;
hq_open();
cnt = do_list(ld);
vmemmap_list = (ulong *)GETBUF(cnt * sizeof(ulong));
cnt = retrieve_list(vmemmap_list, cnt);
hq_close();
if ((ms->vmemmap_list = (struct ppc64_vmemmap *)malloc(cnt *
sizeof(struct ppc64_vmemmap))) == NULL)
error(FATAL, "cannot malloc vmemmap list space");
vmemmap_buf = GETBUF(backing_size);
for (i = 0; i < cnt; i++) {
if (!readmem(vmemmap_list[i], KVADDR, vmemmap_buf,
backing_size, "vmemmap_backing", RETURN_ON_ERROR)) {
free(ms->vmemmap_list);
goto out;
}
ms->vmemmap_list[i].phys = ULONG(vmemmap_buf + phys_offset);
ms->vmemmap_list[i].virt = ULONG(vmemmap_buf + virt_addr_offset);
if (ms->vmemmap_list[i].virt < ms->vmemmap_base)
ms->vmemmap_base = ms->vmemmap_list[i].virt;
}
ms->vmemmap_cnt = cnt;
machdep->flags |= VMEMMAP_AWARE;
if (CRASHDEBUG(1))
fprintf(fp, "ppc64_vmemmap_init: vmemmap base: %lx\n",
ms->vmemmap_base);
out:
FREEBUF(vmemmap_buf);
FREEBUF(vmemmap_list);
}
/*
* If the vmemmap address translation information is stored in the kernel,
* make the translation.
*/
static int
ppc64_vmemmap_to_phys(ulong kvaddr, physaddr_t *paddr, int verbose)
{
int i;
ulong offset;
struct machine_specific *ms;
if (!(machdep->flags & VMEMMAP_AWARE)) {
/*
* During runtime, just fail the command.
*/
if (vt->flags & VM_INIT)
error(FATAL, "cannot translate vmemmap address: %lx\n",
kvaddr);
/*
* During vm_init() initialization, print a warning message.
*/
error(WARNING,
"cannot translate vmemmap kernel virtual addresses:\n"
" commands requiring page structure contents"
" will fail\n\n");