Author: wma Date: Mon Apr 4 07:16:43 2016 New Revision: 297538 URL: https://svnweb.freebsd.org/changeset/base/297538
Log: arm64: pagezero improvement This change has been provided to improve pagezero call performance. Submitted by: Dominik Ermel <d...@semihalf.com> Obtained from: Semihalf Sponsored by: Cavium Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D5741 Modified: head/sys/arm64/arm64/machdep.c head/sys/arm64/arm64/pmap.c head/sys/arm64/arm64/support.S head/sys/arm64/include/machdep.h Modified: head/sys/arm64/arm64/machdep.c ============================================================================== --- head/sys/arm64/arm64/machdep.c Mon Apr 4 07:11:33 2016 (r297537) +++ head/sys/arm64/arm64/machdep.c Mon Apr 4 07:16:43 2016 (r297538) @@ -110,6 +110,13 @@ int64_t icache_line_size; /* The minimum int64_t idcache_line_size; /* The minimum cache line size */ int64_t dczva_line_size; /* The size of cache line the dc zva zeroes */ +/* pagezero_* implementations are provided in support.S */ +void pagezero_simple(void *); +void pagezero_cache(void *); + +/* pagezero_simple is default pagezero */ +void (*pagezero)(void *p) = pagezero_simple; + static void cpu_startup(void *dummy) { @@ -817,6 +824,9 @@ cache_setup(void) /* Same as with above calculations */ dczva_line_shift = DCZID_BS_SIZE(dczid_el0); dczva_line_size = sizeof(int) << dczva_line_shift; + + /* Change pagezero function */ + pagezero = pagezero_cache; } } Modified: head/sys/arm64/arm64/pmap.c ============================================================================== --- head/sys/arm64/arm64/pmap.c Mon Apr 4 07:11:33 2016 (r297537) +++ head/sys/arm64/arm64/pmap.c Mon Apr 4 07:16:43 2016 (r297538) @@ -271,13 +271,6 @@ pagecopy(void *s, void *d) memcpy(d, s, PAGE_SIZE); } -static __inline void -pagezero(void *p) -{ - - bzero(p, PAGE_SIZE); -} - #define pmap_l0_index(va) (((va) >> L0_SHIFT) & L0_ADDR_MASK) #define pmap_l1_index(va) (((va) >> L1_SHIFT) & Ln_ADDR_MASK) #define pmap_l2_index(va) (((va) >> L2_SHIFT) & Ln_ADDR_MASK) Modified: head/sys/arm64/arm64/support.S ============================================================================== --- head/sys/arm64/arm64/support.S Mon Apr 4 07:11:33 2016 (r297537) +++ head/sys/arm64/arm64/support.S Mon Apr 4 07:16:43 2016 (r297538) @@ -33,6 +33,7 @@ __FBSDID("$FreeBSD$"); #include <machine/setjmp.h> +#include <machine/param.h> #include "assym.s" @@ -290,3 +291,38 @@ ENTRY(longjmp) mov x0, x1 ret END(longjmp) + +/* + * pagezero, simple implementation + */ +ENTRY(pagezero_simple) + add x1, x0, #PAGE_SIZE + +1: + stp xzr, xzr, [x0], #0x10 + stp xzr, xzr, [x0], #0x10 + stp xzr, xzr, [x0], #0x10 + stp xzr, xzr, [x0], #0x10 + cmp x0, x1 + b.ne 1b + ret + +END(pagezero_simple) + +/* + * pagezero, cache assisted + */ +ENTRY(pagezero_cache) + add x1, x0, #PAGE_SIZE + + ldr x2, =dczva_line_size + ldr x2, [x2] + +1: + dc zva, x0 + add x0, x0, x2 + cmp x0, x1 + b.ne 1b + ret + +END(pagezero_cache) Modified: head/sys/arm64/include/machdep.h ============================================================================== --- head/sys/arm64/include/machdep.h Mon Apr 4 07:11:33 2016 (r297537) +++ head/sys/arm64/include/machdep.h Mon Apr 4 07:16:43 2016 (r297538) @@ -41,5 +41,6 @@ extern vm_paddr_t physmap[]; extern u_int physmap_idx; void initarm(struct arm64_bootparams *); +extern void (*pagezero)(void *); #endif /* _MACHINE_MACHDEP_H_ */ _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
