088c1894f8
Without this, gdb_enter() is not defined. Change-Id: I067dce371ee817d6ac77387fcbe42a9a7deb6438 Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-on: http://review.coreboot.org/10755 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins)
155 lines
4.3 KiB
C
155 lines
4.3 KiB
C
/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008 coresystems GmbH
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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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#include <libpayload.h>
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#include <assert.h>
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#include <die.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <arch/cache.h>
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#include <arch/virtual.h>
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#include <arch/io.h>
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unsigned long virtual_offset = 0;
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extern char _end[];
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/*
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* MAIR Index
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* (Originally defined in src/arch/arm/include/armv7/arch/cache.h)
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*/
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#define MAIR_INDX_NC 0
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#define MAIR_INDX_WT 1
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#define MAIR_INDX_WB 2
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/*
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* Translation Table Attribute
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* (Originally defined in src/arch/arm/include/armv7/arch/cache.h)
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*/
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#define ATTR_BASE (\
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0ULL << 54 | /* PN. 0:Not restricted */ \
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0ULL << 53 | /* PXN. 0:Not restricted */ \
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1 << 10 | /* AF. 1:Accessed. This is to prevent access \
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* fault when accessed for the first time */ \
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0 << 6 | /* AP[2:1]. 0b00:full access from PL1 */ \
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0 << 5 | /* NS. 0:Output address is in Secure space */ \
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0 << 1 | /* block/table. 0:block entry */ \
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1 << 0 /* validity. 1:valid */ \
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)
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#define ATTR_NC (ATTR_BASE | (MAIR_INDX_NC << 2))
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#define ATTR_WT (ATTR_BASE | (MAIR_INDX_WT << 2))
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#define ATTR_WB (ATTR_BASE | (MAIR_INDX_WB << 2))
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/* Translation Table Entry */
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typedef uint64_t pmd_t;
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typedef uint64_t pgd_t;
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#define SECTION_SHIFT 30
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#define BLOCK_SHIFT 21
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#define PAGE_SHIFT 12
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#define PGD_MASK (~0 << PAGE_SHIFT)
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static pmd_t *ttb_buff = 0;
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static uintptr_t work_block;
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static pmd_t original_map;
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int getpagesize(void)
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{
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return 1 << PAGE_SHIFT;
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}
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static void lpae_map_init(void)
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{
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pgd_t *pgd;
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die_if(!(read_ttbcr() >> 31), "LPAE is not enabled\n");
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/* get work block address */
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work_block = ALIGN_UP((uintptr_t)_end, 2*MiB);
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assert(work_block);
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printf("Work block for LPAE mapping is @ 0x%p\n", (void *)work_block);
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/* get the address of the 1st pmd from pgd[0] */
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pgd = (pgd_t *)((uintptr_t)read_ttbr0() & PGD_MASK);
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ttb_buff = (pmd_t *)((uintptr_t)pgd[0] & PGD_MASK);
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assert(ttb_buff);
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original_map = ttb_buff[work_block >> BLOCK_SHIFT];
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}
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static void lpae_flush_work_block(void)
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{
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dccmvac((uintptr_t)&ttb_buff[work_block >> BLOCK_SHIFT]);
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dsb();
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tlbimvaa(work_block);
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dsb();
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isb();
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}
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/**
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* Maps a 2MB designated block to a requested physical address, and returns
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* the address to the block or NULL on error.
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*
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* pa_mb: Physical address in MB. Has to be on a 2MB boundary.
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* policy: Data chache policy
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*/
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void *lpae_map_phys_addr(unsigned long pa_mb, enum dcache_policy policy)
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{
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pmd_t attr;
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if (!ttb_buff)
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lpae_map_init();
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switch(policy) {
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case DCACHE_OFF:
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attr = ATTR_NC;
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break;
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case DCACHE_WRITEBACK:
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attr = ATTR_WB;
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break;
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case DCACHE_WRITETHROUGH:
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attr = ATTR_WT;
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break;
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default:
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return NULL;
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}
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ttb_buff[work_block >> BLOCK_SHIFT] =
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((pmd_t)pa_mb/2 << BLOCK_SHIFT) | attr;
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lpae_flush_work_block();
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return (void *)work_block;
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}
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void lpae_restore_map(void)
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{
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ttb_buff[work_block >> BLOCK_SHIFT] = original_map;
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lpae_flush_work_block();
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}
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