From aa9143b9719c07fb6f1f6207790c9c5086ae07e7 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Thu, 9 Feb 2006 16:12:22 -0800 Subject: [SPARC64]: Implement sun4v TSB miss handlers. When we register a TSB with the hypervisor, so that it or hardware can handle TLB misses and do the TSB walk for us, the hypervisor traps down to these trap when it incurs a TSB miss. Processing is simple, we load the missing virtual address and context, and do a full page table walk. Signed-off-by: David S. Miller --- include/asm-sparc64/ttable.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'include/asm-sparc64') diff --git a/include/asm-sparc64/ttable.h b/include/asm-sparc64/ttable.h index f912f52..972f913 100644 --- a/include/asm-sparc64/ttable.h +++ b/include/asm-sparc64/ttable.h @@ -180,6 +180,26 @@ #define KPROBES_TRAP(lvl) TRAP_ARG(bad_trap, lvl) #endif +#define SUN4V_ITSB_MISS \ + mov SCRATCHPAD_CPUID, %g1; \ + ldxa [%g1] ASI_SCRATCHPAD, %g2; \ + ldxa [%g1 + %g1] ASI_SCRATCHPAD, %g1;\ + sethi %hi(trap_block), %g5; \ + sllx %g2, TRAP_BLOCK_SZ_SHIFT, %g2; \ + or %g5, %lo(trap_block), %g5; \ + ba,pt %xcc, sun4v_itsb_miss; \ + add %g5, %g2, %g5; + +#define SUN4V_DTSB_MISS \ + mov SCRATCHPAD_CPUID, %g1; \ + ldxa [%g1] ASI_SCRATCHPAD, %g2; \ + ldxa [%g1 + %g1] ASI_SCRATCHPAD, %g1;\ + sethi %hi(trap_block), %g5; \ + sllx %g2, TRAP_BLOCK_SZ_SHIFT, %g2; \ + or %g5, %lo(trap_block), %g5; \ + ba,pt %xcc, sun4v_dtsb_miss; \ + add %g5, %g2, %g5; + /* Before touching these macros, you owe it to yourself to go and * see how arch/sparc64/kernel/winfixup.S works... -DaveM * -- cgit v1.1