Patrick Georgi (pgeorgi@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9979
-gerrit
commit 66604d8217d39306d1801de4aa24dbe1ed37bb94 Author: Joseph Lo josephl@nvidia.com Date: Tue Apr 14 16:03:58 2015 +0800
arm64: introduce data cache ops by set/way to the level specified
This patchs introduces level specific data cache maintenance operations to cache_helpers.S. It's derived form ARM trusted firmware repository. Please reference here.
https://github.com/ARM-software/arm-trusted-firmware/blob/master/ lib/aarch64/cache_helpers.S
BRANCH=none BUG=none TEST=boot on smaug/foster
Change-Id: Ib58a6d6f95eb51ce5d80749ff51d9d389b0d1343 Signed-off-by: Patrick Georgi pgeorgi@chromium.org Original-Commit-Id: b3d1a16bd0089740f1f2257146c771783beece82 Original-Change-Id: Ifcd1dbcd868331107d0d47af73545a3a159fdff6 Original-Signed-off-by: Joseph Lo josephl@nvidia.com Original-Reviewed-on: https://chromium-review.googlesource.com/265826 Original-Reviewed-by: Aaron Durbin adurbin@chromium.org --- src/arch/arm64/armv8/Makefile.inc | 4 + src/arch/arm64/armv8/cache.c | 5 +- src/arch/arm64/armv8/cache_helpers.S | 123 ++++++++++++++++++++++++++++ src/arch/arm64/armv8/cpu.S | 59 +------------ src/arch/arm64/armv8/secmon/Makefile.inc | 1 + src/arch/arm64/include/arch/cache_helpers.h | 47 +++++++++++ src/arch/arm64/include/armv8/arch/cache.h | 5 +- 7 files changed, 184 insertions(+), 60 deletions(-)
diff --git a/src/arch/arm64/armv8/Makefile.inc b/src/arch/arm64/armv8/Makefile.inc index 5532b47..d043921 100644 --- a/src/arch/arm64/armv8/Makefile.inc +++ b/src/arch/arm64/armv8/Makefile.inc @@ -37,6 +37,7 @@ bootblock-y += bootblock.S bootblock-y += bootblock_simple.c endif bootblock-y += cache.c +bootblock-y += cache_helpers.S bootblock-y += cpu.S bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += exception.c
@@ -52,6 +53,7 @@ ifeq ($(CONFIG_ARCH_VERSTAGE_ARMV8_64),y)
verstage-y += cache.c verstage-y += cpu.S +verstage-y += cache_helpers.S verstage-y += exception.c
verstage-c-ccopts += $(armv8_flags) @@ -65,6 +67,7 @@ endif ifeq ($(CONFIG_ARCH_ROMSTAGE_ARMV8_64),y)
romstage-y += cache.c +romstage-y += cache_helpers.S romstage-y += cpu.S romstage-y += exception.c
@@ -82,6 +85,7 @@ endif ifeq ($(CONFIG_ARCH_RAMSTAGE_ARMV8_64),y)
ramstage-y += cache.c +ramstage-y += cache_helpers.S ramstage-y += cpu.S ramstage-y += exception.c ramstage-y += mmu.c diff --git a/src/arch/arm64/armv8/cache.c b/src/arch/arm64/armv8/cache.c index d568f26..db9b388 100644 --- a/src/arch/arm64/armv8/cache.c +++ b/src/arch/arm64/armv8/cache.c @@ -34,6 +34,7 @@ #include <stdint.h>
#include <arch/cache.h> +#include <arch/cache_helpers.h> #include <arch/lib_helpers.h>
void tlb_invalidate_all(void) @@ -126,7 +127,7 @@ void dcache_mmu_disable(void) { uint32_t sctlr;
- flush_dcache_all(); + flush_dcache_all(DCCISW); sctlr = raw_read_sctlr_current(); sctlr &= ~(SCTLR_C | SCTLR_M); raw_write_sctlr_current(sctlr); @@ -143,6 +144,6 @@ void dcache_mmu_enable(void)
void cache_sync_instructions(void) { - flush_dcache_all(); /* includes trailing DSB (in assembly) */ + flush_dcache_all(DCCISW); /* includes trailing DSB (in assembly) */ icache_invalidate_all(); /* includdes leading DSB and trailing ISB. */ } diff --git a/src/arch/arm64/armv8/cache_helpers.S b/src/arch/arm64/armv8/cache_helpers.S new file mode 100644 index 0000000..dc74dad --- /dev/null +++ b/src/arch/arm64/armv8/cache_helpers.S @@ -0,0 +1,123 @@ +/* + * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * Neither the name of ARM nor the names of its contributors may be used + * to endorse or promote products derived from this software without specific + * prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <arch/asm.h> +#include <arch/cache_helpers.h> + + /* --------------------------------------------------------------- + * Data cache operations by set/way to the level specified + * + * The main function, do_dcsw_op requires: + * x0: The operation type (0-2), as defined in cache_helpers.h + * x3: The last cache level to operate on + * x9: clidr_el1 + * and will carry out the operation on each data cache from level 0 + * to the level in x3 in sequence + * + * The dcsw_op macro sets up the x3 and x9 parameters based on + * clidr_el1 cache information before invoking the main function + * --------------------------------------------------------------- + */ + +.macro dcsw_op shift, fw, ls + mrs x9, clidr_el1 + ubfx x3, x9, \shift, \fw + lsl x3, x3, \ls + b do_dcsw_op +.endm + +do_dcsw_op: + cbz x3, exit + mov x10, xzr + adr x14, dcsw_loop_table // compute inner loop address + add x14, x14, x0, lsl #5 // inner loop is 8x32-bit instructions + mov x0, x9 + mov w8, #1 +loop1: + add x2, x10, x10, lsr #1 // work out 3x current cache level + lsr x1, x0, x2 // extract cache type bits from clidr + and x1, x1, #7 // mask the bits for current cache only + cmp x1, #2 // see what cache we have at this level + b.lt level_done // nothing to do if no cache or icache + + msr csselr_el1, x10 // select current cache level in csselr + isb // isb to sych the new cssr&csidr + mrs x1, ccsidr_el1 // read the new ccsidr + and x2, x1, #7 // extract the length of the cache lines + add x2, x2, #4 // add 4 (line length offset) + ubfx x4, x1, #3, #10 // maximum way number + clz w5, w4 // bit position of way size increment + lsl w9, w4, w5 // w9 = aligned max way number + lsl w16, w8, w5 // w16 = way number loop decrement + orr w9, w10, w9 // w9 = combine way and cache number + ubfx w6, w1, #13, #15 // w6 = max set number + lsl w17, w8, w2 // w17 = set number loop decrement + dsb sy // barrier before we start this level + br x14 // jump to DC operation specific loop + +level_done: + add x10, x10, #2 // increment cache number + cmp x3, x10 + b.gt loop1 + msr csselr_el1, xzr // select cache level 0 in csselr + dsb sy // barrier to complete final cache operation + isb +exit: + ret + +.macro dcsw_loop _op +loop2__op: + lsl w7, w6, w2 // w7 = aligned max set number + +loop3__op: + orr w11, w9, w7 // combine cache, way and set number + dc _op, x11 + subs w7, w7, w17 // decrement set number + b.ge loop3__op + + subs x9, x9, x16 // decrement way number + b.ge loop2__op + + b level_done +.endm + +dcsw_loop_table: + dcsw_loop isw + dcsw_loop cisw + dcsw_loop csw + +ENTRY(flush_dcache_louis) + dcsw_op #LOUIS_SHIFT, #CLIDR_FIELD_WIDTH, #LEVEL_SHIFT +ENDPROC(flush_dcache_louis) + +ENTRY(flush_dcache_all) + dcsw_op #LOC_SHIFT, #CLIDR_FIELD_WIDTH, #LEVEL_SHIFT +ENDPROC(flush_dcache_all) diff --git a/src/arch/arm64/armv8/cpu.S b/src/arch/arm64/armv8/cpu.S index 1eecc2b..80e083e 100644 --- a/src/arch/arm64/armv8/cpu.S +++ b/src/arch/arm64/armv8/cpu.S @@ -19,63 +19,7 @@ */
#include <arch/asm.h> - -/* - * flush_dcache_all() - * - * Flush the whole D-cache. - * - * Corrupted registers: x0-x7, x9-x11 - * From: Linux arch/arm64/mm/cache.S - */ -ENTRY(flush_dcache_all) - dsb sy // ensure ordering with previous memory accesses - mrs x0, clidr_el1 // read clidr - and x3, x0, #0x7000000 // extract loc from clidr - lsr x3, x3, #23 // left align loc bit field - cbz x3, finished // if loc is 0, then no need to clean - mov x10, #0 // start clean at cache level 0 -loop1: - add x2, x10, x10, lsr #1 // work out 3x current cache level - lsr x1, x0, x2 // extract cache type bits from clidr - and x1, x1, #7 // mask of the bits for current cache only - cmp x1, #2 // see what cache we have at this level - b.lt skip // skip if no cache, or just i-cache - mrs x9, daif // make CSSELR and CCSIDR access atomic - msr csselr_el1, x10 // select current cache level in csselr - isb // isb to sych the new cssr&csidr - mrs x1, ccsidr_el1 // read the new ccsidr - msr daif, x9 - and x2, x1, #7 // extract the length of the cache lines - add x2, x2, #4 // add 4 (line length offset) - mov x4, #0x3ff - and x4, x4, x1, lsr #3 // find maximum number on the way size - clz x5, x4 // find bit position of way size increment - mov x7, #0x7fff - and x7, x7, x1, lsr #13 // extract max number of the index size -loop2: - mov x9, x4 // create working copy of max way size -loop3: - lsl x6, x9, x5 - orr x11, x10, x6 // factor way and cache number into x11 - lsl x6, x7, x2 - orr x11, x11, x6 // factor index number into x11 - dc cisw, x11 // clean & invalidate by set/way - subs x9, x9, #1 // decrement the way - b.ge loop3 - subs x7, x7, #1 // decrement the index - b.ge loop2 -skip: - add x10, x10, #2 // increment cache number - cmp x3, x10 - b.gt loop1 -finished: - mov x10, #0 // swith back to cache level 0 - msr csselr_el1, x10 // select current cache level in csselr - dsb sy - isb - ret -ENDPROC(flush_dcache_all) +#include <arch/cache_helpers.h>
/* * Bring an ARMv8 processor we just gained control of (e.g. from IROM) into a @@ -92,6 +36,7 @@ ENTRY(arm_init_caches) /* FIXME: How to enable branch prediction on ARMv8? */
/* Flush and invalidate dcache */ + mov x0, #DCCISW bl flush_dcache_all
/* Deactivate MMU (0), Alignment Check (1) and DCache (2) */ diff --git a/src/arch/arm64/armv8/secmon/Makefile.inc b/src/arch/arm64/armv8/secmon/Makefile.inc index ace00b4..11dcb9a 100644 --- a/src/arch/arm64/armv8/secmon/Makefile.inc +++ b/src/arch/arm64/armv8/secmon/Makefile.inc @@ -35,6 +35,7 @@ secmon-y += psci.c secmon-y += smc.c secmon-y += trampoline.S secmon-y += ../cache.c +secmon-y += ../cache_helpers.S secmon-y += ../cpu.S secmon-y += ../exception.c secmon-y += ../../cpu.c diff --git a/src/arch/arm64/include/arch/cache_helpers.h b/src/arch/arm64/include/arch/cache_helpers.h new file mode 100644 index 0000000..2919d99 --- /dev/null +++ b/src/arch/arm64/include/arch/cache_helpers.h @@ -0,0 +1,47 @@ +/* + * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * Neither the name of ARM nor the names of its contributors may be used + * to endorse or promote products derived from this software without specific + * prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __CACHE_HELPERS_H + +/* CLIDR definitions */ +#define LOUIS_SHIFT 21 +#define LOC_SHIFT 24 +#define CLIDR_FIELD_WIDTH 3 + +/* CSSELR definitions */ +#define LEVEL_SHIFT 1 + +/* D$ set/way op type defines */ +#define DCISW 0x0 +#define DCCISW 0x1 +#define DCCSW 0x2 + +#endif /* __CACHE_HELPERS_H */ diff --git a/src/arch/arm64/include/armv8/arch/cache.h b/src/arch/arm64/include/armv8/arch/cache.h index 27fe8e0..5e2a4a1 100644 --- a/src/arch/arm64/include/armv8/arch/cache.h +++ b/src/arch/arm64/include/armv8/arch/cache.h @@ -69,7 +69,10 @@ void dcache_clean_invalidate_by_mva(void const *addr, size_t len); void dcache_invalidate_by_mva(void const *addr, size_t len);
/* dcache invalidate all */ -void flush_dcache_all(void); +void flush_dcache_all(int op_type); + +/* flush the dcache up to the Level of Unification Inner Shareable */ +void flush_dcache_louis(int op_type);
/* returns number of bytes per cache line */ unsigned int dcache_line_bytes(void);