Date: Sat, 29 Apr 2006 02:02:50 GMT From: Kip Macy <kmacy@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 96342 for review Message-ID: <200604290202.k3T22oxQ044466@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=96342 Change 96342 by kmacy@kmacy_storage:sun4v_rwbuf on 2006/04/29 02:01:49 handle alignment trap fix page mask generation in upgrade_demap do a series of putchars when we hit a condition we can't handle Affected files ... .. //depot/projects/kmacy_sun4v/src/sys/sun4v/sun4v/exception.S#43 edit Differences ... ==== //depot/projects/kmacy_sun4v/src/sys/sun4v/sun4v/exception.S#43 (text+ko) ==== @@ -65,6 +65,10 @@ #define PCB_REG %g6 +#define PUTCHAR(x) \ + mov x, %o0 ; \ + mov CONS_WRITE, %o5 ; \ + ta FAST_TRAP /* * Atomically set the reference bit in a tte. */ @@ -236,17 +240,12 @@ .endr .endm - - .macro tl1_split - call kdb_backtrace - .endm - .macro tl1_setup type - tl1_split - clr %o1 - set trap, %o2 + rdpr %tt, %g3 + sub %g0, 1, %g4 + set trap, %g1 ba %xcc, tl1_trap - mov \type | T_KERNEL, %o0 + mov \type, %g2 .endm .macro tl1_gen type @@ -311,15 +310,12 @@ .endm .macro tl0_align - tl0_gen T_RESERVED -#if 0 GET_MMFSA_SCRATCH(%g1) mov MMFSA_D_ADDR, %g3 mov MMFSA_D_CTX, %g7 ldxa [%g1 + %g3]ASI_REAL, %g5 - ba,pt %xcc, tsb_miss_handler - mov T_DATA_PROTECTION, %g3 -#endif + ba,pt %xcc, tl0_trap + mov T_MEM_ADDRESS_NOT_ALIGNED, %g3 .align 32 .endm @@ -1517,7 +1513,9 @@ cmp %g2, %g4 bne,pt %xcc, 10f nop - call kdb_backtrace + PUTCHAR(0x5a) + PUTCHAR(0x5a) + PUTCHAR(0x5a) MAGIC_TRAP_ON;MAGIC_TRAP_ON;MAGIC_EXIT ! die if all we're doing ! is storing same data 10: @@ -1527,16 +1525,16 @@ stxa %g4, [%g2]ASI_REAL ! store tag stxa %g5, [%g2 + %g7]ASI_REAL ! store data - ! XXX the following intstruction should be replaced with a - ! retry on HVs that do auto-demap -ontario_demap_errata_patch: +upgrade_demap: + MAGIC_TRAP_ON rdpr %tt, %g5 cmp %g5, T_DATA_PROTECTION beq,pn %xcc, demap_begin nop + MAGIC_TRAP_OFF retry demap_begin: - sethi %hi(PAGE_MASK), %g1 + sethi %hi(PAGE_SIZE), %g1 sub %g1, 1, %g1 and %g6, %g1, %g2 andn %g6, %g1, %g3 @@ -1550,6 +1548,7 @@ mov %g5, %o0 mov %g6, %o1 mov %g7, %o2 + MAGIC_TRAP_OFF retry END(tsb_miss_handler) @@ -1572,7 +1571,9 @@ * Programming error */ ENTRY(unsupported_fault_trap) - call kdb_backtrace + PUTCHAR(0x5b) + PUTCHAR(0x5b) + PUTCHAR(0x5b) MAGIC_TRAP_ON;MAGIC_TRAP_ON;MAGIC_EXIT END(unsupported_fault_trap)
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