baa3e70084
coreboot and libpayload currently use completely different code to perform a full cache flush on ARM64, with even different function names. The libpayload code is closely inspired by the ARM32 version, so for the sake of overall consistency let's sync coreboot to that. Also align a few other cache management details to work the same way as the corresponding ARM32 parts (such as only flushing but not invalidating the data cache after loading a new stage, which may have a small performance benefit). Change-Id: I9e05b425eeeaa27a447b37f98c0928fed3f74340 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/19785 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2013 Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* cache.c: Cache maintenance routines for ARM64-A and ARM64-R
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*
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* Reference: ARM64 Architecture Reference Manual, ARM64-A and ARM64-R edition
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*/
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#include <stdint.h>
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#include <arch/cache.h>
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#include <arch/lib_helpers.h>
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void tlb_invalidate_all(void)
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{
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/* TLBIALL includes dTLB and iTLB on systems that have them. */
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tlbiall_current();
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dsb();
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isb();
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}
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enum dcache_op {
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OP_DCCSW,
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OP_DCCISW,
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OP_DCISW,
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OP_DCCIVAC,
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OP_DCCVAC,
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OP_DCIVAC,
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};
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unsigned int dcache_line_bytes(void)
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{
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uint32_t ccsidr;
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static unsigned int line_bytes = 0;
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if (line_bytes)
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return line_bytes;
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ccsidr = raw_read_ccsidr_el1();
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/* [2:0] - Indicates (Log2(number of words in cache line)) - 2 */
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line_bytes = 1 << ((ccsidr & 0x7) + 2); /* words per line */
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line_bytes *= sizeof(unsigned int); /* bytes per word */
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return line_bytes;
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}
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/*
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* Do a dcache operation by virtual address. This is useful for
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* maintaining coherency in drivers which do DMA transfers and only need to
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* perform cache maintenance on a particular memory range rather than the
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* entire cache.
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*/
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static void dcache_op_va(void const *addr, size_t len, enum dcache_op op)
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{
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unsigned long line, linesize;
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linesize = dcache_line_bytes();
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line = (uintptr_t)addr & ~(linesize - 1);
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dsb();
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while (line < (uintptr_t)addr + len) {
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switch(op) {
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case OP_DCCIVAC:
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dccivac(line);
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break;
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case OP_DCCVAC:
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dccvac(line);
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break;
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case OP_DCIVAC:
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dcivac(line);
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break;
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default:
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break;
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}
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line += linesize;
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}
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isb();
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}
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void dcache_clean_by_mva(void const *addr, size_t len)
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{
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dcache_op_va(addr, len, OP_DCCVAC);
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}
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void dcache_clean_invalidate_by_mva(void const *addr, size_t len)
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{
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dcache_op_va(addr, len, OP_DCCIVAC);
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}
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void dcache_invalidate_by_mva(void const *addr, size_t len)
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{
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dcache_op_va(addr, len, OP_DCIVAC);
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}
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void cache_sync_instructions(void)
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{
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uint32_t sctlr = raw_read_sctlr_current();
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if (sctlr & SCTLR_C)
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dcache_clean_all(); /* includes trailing DSB (assembly) */
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else if (sctlr & SCTLR_I)
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dcache_clean_invalidate_all();
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icache_invalidate_all(); /* includes leading DSB and trailing ISB */
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}
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void arch_program_segment_loaded(void const *addr, size_t len)
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{
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dcache_clean_invalidate_by_mva(addr, len);
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icache_invalidate_all();
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}
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