Author: markj Date: Tue Mar 5 23:56:40 2019 New Revision: 344827 URL: https://svnweb.freebsd.org/changeset/base/344827
Log: Add pmap_get_tables() for riscv. This mirrors the arm64 implementation and is for use in the minidump code. Submitted by: Mitchell Horne <mhorne...@gmail.com> Differential Revision: https://reviews.freebsd.org/D18321 Modified: head/sys/riscv/riscv/pmap.c Modified: head/sys/riscv/riscv/pmap.c ============================================================================== --- head/sys/riscv/riscv/pmap.c Tue Mar 5 22:55:33 2019 (r344826) +++ head/sys/riscv/riscv/pmap.c Tue Mar 5 23:56:40 2019 (r344827) @@ -4438,3 +4438,40 @@ pmap_is_valid_memattr(pmap_t pmap __unused, vm_memattr return (mode >= VM_MEMATTR_DEVICE && mode <= VM_MEMATTR_WRITE_BACK); } + +bool +pmap_get_tables(pmap_t pmap, vm_offset_t va, pd_entry_t **l1, pd_entry_t **l2, + pt_entry_t **l3) +{ + pd_entry_t *l1p, *l2p; + + /* Get l1 directory entry. */ + l1p = pmap_l1(pmap, va); + *l1 = l1p; + + if (l1p == NULL || (pmap_load(l1p) & PTE_V) == 0) + return (false); + + if ((pmap_load(l1p) & PTE_RX) != 0) { + *l2 = NULL; + *l3 = NULL; + return (true); + } + + /* Get l2 directory entry. */ + l2p = pmap_l1_to_l2(l1p, va); + *l2 = l2p; + + if (l2p == NULL || (pmap_load(l2p) & PTE_V) == 0) + return (false); + + if ((pmap_load(l2p) & PTE_RX) != 0) { + *l3 = NULL; + return (true); + } + + /* Get l3 page table entry. */ + *l3 = pmap_l2_to_l3(l2p, va); + + return (true); +} _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
