Author: jhibbits
Date: Thu Apr 25 00:39:43 2013
New Revision: 249864
URL: http://svnweb.freebsd.org/changeset/base/249864
Log:
Introduce kernel coredumps to ppc32 AIM. Leeched from the booke code.
MFC after: 2 weeks
Modified:
head/sys/powerpc/aim/mmu_oea.c
Modified: head/sys/powerpc/aim/mmu_oea.c
==============================================================================
--- head/sys/powerpc/aim/mmu_oea.c Wed Apr 24 23:38:04 2013
(r249863)
+++ head/sys/powerpc/aim/mmu_oea.c Thu Apr 25 00:39:43 2013
(r249864)
@@ -167,6 +167,11 @@ struct ofw_map {
u_int om_mode;
};
+extern unsigned char _etext[];
+extern unsigned char _end[];
+
+extern int dumpsys_minidump;
+
/*
* Map of physical memory regions.
*/
@@ -316,6 +321,9 @@ void moea_kenter(mmu_t, vm_offset_t, vm_
void moea_page_set_memattr(mmu_t mmu, vm_page_t m, vm_memattr_t ma);
boolean_t moea_dev_direct_mapped(mmu_t, vm_paddr_t, vm_size_t);
static void moea_sync_icache(mmu_t, pmap_t, vm_offset_t, vm_size_t);
+vm_offset_t moea_dumpsys_map(mmu_t mmu, struct pmap_md *md, vm_size_t ofs,
+ vm_size_t *sz);
+struct pmap_md * moea_scan_md(mmu_t mmu, struct pmap_md *prev);
static mmu_method_t moea_methods[] = {
MMUMETHOD(mmu_change_wiring, moea_change_wiring),
@@ -363,6 +371,8 @@ static mmu_method_t moea_methods[] = {
MMUMETHOD(mmu_kenter, moea_kenter),
MMUMETHOD(mmu_kenter_attr, moea_kenter_attr),
MMUMETHOD(mmu_dev_direct_mapped,moea_dev_direct_mapped),
+ MMUMETHOD(mmu_scan_md, moea_scan_md),
+ MMUMETHOD(mmu_dumpsys_map, moea_dumpsys_map),
{ 0, 0 }
};
@@ -2567,3 +2577,104 @@ moea_sync_icache(mmu_t mmu, pmap_t pm, v
}
PMAP_UNLOCK(pm);
}
+
+vm_offset_t
+moea_dumpsys_map(mmu_t mmu, struct pmap_md *md, vm_size_t ofs,
+ vm_size_t *sz)
+{
+ if (md->md_vaddr == ~0UL)
+ return (md->md_paddr + ofs);
+ else
+ return (md->md_vaddr + ofs);
+}
+
+/* TODO: Run this on minbar, single calls, to check addresses, offsets, and
+ * sizes. It should be doing more than just single pages.
+ */
+struct pmap_md *
+moea_scan_md(mmu_t mmu, struct pmap_md *prev)
+{
+ static struct pmap_md md;
+ struct pvo_entry *pvo;
+ vm_offset_t va;
+
+ if (dumpsys_minidump) {
+ md.md_paddr = ~0UL; /* Minidumps use virtual addresses. */
+ if (prev == NULL) {
+ /* 1st: kernel .data and .bss. */
+ md.md_index = 1;
+ md.md_vaddr = trunc_page((uintptr_t)_etext);
+ md.md_size = round_page((uintptr_t)_end) - md.md_vaddr;
+ return (&md);
+ }
+ switch (prev->md_index) {
+ case 1:
+ /* 2nd: msgbuf and tables (see pmap_bootstrap()). */
+ md.md_index = 2;
+ md.md_vaddr = (vm_offset_t)msgbufp->msg_ptr;
+ md.md_size = round_page(msgbufp->msg_size);
+ break;
+ case 2:
+ /* 3rd: kernel VM. */
+ va = prev->md_vaddr + prev->md_size;
+ /* Find start of next chunk (from va). */
+ while (va < virtual_end) {
+ /* Don't dump the buffer cache. */
+ if (va >= kmi.buffer_sva &&
+ va < kmi.buffer_eva) {
+ va = kmi.buffer_eva;
+ continue;
+ }
+ pvo = moea_pvo_find_va(kernel_pmap,
+ va & ~ADDR_POFF, NULL);
+ if (pvo != NULL &&
+ (pvo->pvo_pte.pte.pte_hi & PTE_VALID))
+ break;
+ va += PAGE_SIZE;
+ }
+ if (va < virtual_end) {
+ md.md_vaddr = va;
+ va += PAGE_SIZE;
+ /* Find last page in chunk. */
+ while (va < virtual_end) {
+ /* Don't run into the buffer cache. */
+ if (va == kmi.buffer_sva)
+ break;
+ pvo = moea_pvo_find_va(kernel_pmap,
+ va & ~ADDR_POFF, NULL);
+ if (pvo == NULL ||
+ !(pvo->pvo_pte.pte.pte_hi &
PTE_VALID))
+ break;
+ va += PAGE_SIZE;
+ }
+ md.md_size = va - md.md_vaddr;
+ break;
+ }
+ md.md_index = 3;
+ /* FALLTHROUGH */
+ default:
+ return (NULL);
+ }
+ } else { /* minidumps */
+ mem_regions(&pregions, &pregions_sz,
+ ®ions, ®ions_sz);
+
+ if (prev == NULL) {
+ /* first physical chunk. */
+ md.md_paddr = pregions[0].mr_start;
+ md.md_size = pregions[0].mr_size;
+ md.md_vaddr = ~0UL;
+ md.md_index = 1;
+ } else if (md.md_index < pregions_sz) {
+ md.md_paddr = pregions[md.md_index].mr_start;
+ md.md_size = pregions[md.md_index].mr_size;
+ md.md_vaddr = ~0UL;
+ md.md_index++;
+ } else {
+ /* There's no next physical chunk. */
+ return (NULL);
+ }
+ }
+
+ return (&md);
+}
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