diff options
| author | David S. Miller <davem@sunset.davemloft.net> | 2006-02-06 23:44:37 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-03-20 01:11:52 -0800 |
| commit | d257d5da39a78b32721ca84b2ba7f461f2f7ed7f (patch) | |
| tree | ac28d377688ebe13a4d38e05f4ff65ba73d8652a /arch/sparc64/mm/init.c | |
| parent | 840aaef8db32572b6d11e0d5cb5e6efcbc812000 (diff) | |
| download | lwn-d257d5da39a78b32721ca84b2ba7f461f2f7ed7f.tar.gz lwn-d257d5da39a78b32721ca84b2ba7f461f2f7ed7f.zip | |
[SPARC64]: Initial sun4v TLB miss handling infrastructure.
Things are a little tricky because, unlike sun4u, we have
to:
1) do a hypervisor trap to do the TLB load.
2) do the TSB lookup calculations by hand
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/mm/init.c')
| -rw-r--r-- | arch/sparc64/mm/init.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index ab50cd9618f3..e9aac424877f 100644 --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -1050,8 +1050,25 @@ unsigned long __init find_ecache_flush_span(unsigned long size) static void __init tsb_phys_patch(void) { + struct tsb_ldquad_phys_patch_entry *pquad; struct tsb_phys_patch_entry *p; + pquad = &__tsb_ldquad_phys_patch; + while (pquad < &__tsb_ldquad_phys_patch_end) { + unsigned long addr = pquad->addr; + + if (tlb_type == hypervisor) + *(unsigned int *) addr = pquad->sun4v_insn; + else + *(unsigned int *) addr = pquad->sun4u_insn; + wmb(); + __asm__ __volatile__("flush %0" + : /* no outputs */ + : "r" (addr)); + + pquad++; + } + p = &__tsb_phys_patch; while (p < &__tsb_phys_patch_end) { unsigned long addr = p->addr; @@ -1069,6 +1086,7 @@ static void __init tsb_phys_patch(void) /* paging_init() sets up the page tables */ extern void cheetah_ecache_flush_init(void); +extern void sun4v_patch_tlb_handlers(void); static unsigned long last_valid_pfn; pgd_t swapper_pg_dir[2048]; @@ -1078,9 +1096,13 @@ void __init paging_init(void) unsigned long end_pfn, pages_avail, shift; unsigned long real_end, i; - if (tlb_type == cheetah_plus) + if (tlb_type == cheetah_plus || + tlb_type == hypervisor) tsb_phys_patch(); + if (tlb_type == hypervisor) + sun4v_patch_tlb_handlers(); + /* Find available physical memory... */ read_obp_memory("available", &pavail[0], &pavail_ents); |