/* * This file is part of the coreboot project. * * Copyright 2014 Google Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 __ARCH_ARM64_MMU_H__ #define __ARCH_ARM64_MMU_H__ #include struct mmu_memrange { uint64_t base; uint64_t size; uint64_t type; }; struct mmu_ranges { struct mmu_memrange entries[SYSINFO_MAX_MEM_RANGES]; size_t used; }; /* * Symbols taken from linker script * They mark the start and end of the region used by payload */ extern char _start[], _end[]; /* IMPORTANT!!!!!!! * Assumptions made: * Granule size is 64KiB * BITS per Virtual address is 33 * All the calculations for tables L1,L2 and L3 are based on these assumptions * If these values are changed, recalculate the other macros as well */ /* Memory attributes for mmap regions * These attributes act as tag values for memrange regions */ #define TYPE_NORMAL_MEM 1 #define TYPE_DEV_MEM 2 #define TYPE_DMA_MEM 3 /* Descriptor attributes */ #define INVALID_DESC 0x0 #define BLOCK_DESC 0x1 #define TABLE_DESC 0x3 #define PAGE_DESC 0x3 /* Block descriptor */ #define BLOCK_NS (1 << 5) #define BLOCK_AP_RW (0 << 7) #define BLOCK_AP_RO (1 << 7) #define BLOCK_ACCESS (1 << 10) /* XLAT Table Init Attributes */ #define VA_START 0x0 /* If BITS_PER_VA or GRANULE_SIZE are changed, recalculate and change the macros following them */ #define BITS_PER_VA 33 /* Granule size of 64KB is being used */ #define MIN_64_BIT_ADDR (1UL << 32) #define XLAT_TABLE_MASK ~(0xffffUL) #define GRANULE_SIZE_SHIFT 16 #define GRANULE_SIZE (1 << GRANULE_SIZE_SHIFT) #define GRANULE_SIZE_MASK ((1 << 16) - 1) #define L1_ADDR_SHIFT 42 #define L2_ADDR_SHIFT 29 #define L3_ADDR_SHIFT 16 #define L1_ADDR_MASK (0UL << L1_ADDR_SHIFT) #define L2_ADDR_MASK (0xfUL << L2_ADDR_SHIFT) #define L3_ADDR_MASK (0x1fffUL << L3_ADDR_SHIFT) /* Dependent on BITS_PER_VA and GRANULE_SIZE */ #define INIT_LEVEL 2 #define XLAT_MAX_LEVEL 3 /* Each entry in XLAT table is 8 bytes */ #define XLAT_ENTRY_SHIFT 3 #define XLAT_ENTRY_SIZE (1 << XLAT_ENTRY_SHIFT) #define XLAT_TABLE_SHIFT GRANULE_SIZE_SHIFT #define XLAT_TABLE_SIZE (1 << XLAT_TABLE_SHIFT) #define XLAT_NUM_ENTRIES_SHIFT (XLAT_TABLE_SHIFT - XLAT_ENTRY_SHIFT) #define XLAT_NUM_ENTRIES (1 << XLAT_NUM_ENTRIES_SHIFT) #define L3_XLAT_SIZE_SHIFT (GRANULE_SIZE_SHIFT) #define L2_XLAT_SIZE_SHIFT (GRANULE_SIZE_SHIFT + XLAT_NUM_ENTRIES_SHIFT) #define L1_XLAT_SIZE_SHIFT (GRANULE_SIZE_SHIFT + XLAT_NUM_ENTRIES_SHIFT) /* These macros give the size of the region addressed by each entry of a xlat table at any given level */ #define L3_XLAT_SIZE (1 << L3_XLAT_SIZE_SHIFT) #define L2_XLAT_SIZE (1 << L2_XLAT_SIZE_SHIFT) #define L1_XLAT_SIZE (1 << L1_XLAT_SIZE_SHIFT) /* Block indices required for MAIR */ #define BLOCK_INDEX_MEM_DEV_NGNRNE 0 #define BLOCK_INDEX_MEM_DEV_NGNRE 1 #define BLOCK_INDEX_MEM_DEV_GRE 2 #define BLOCK_INDEX_MEM_NORMAL_NC 3 #define BLOCK_INDEX_MEM_NORMAL 4 #define BLOCK_INDEX_SHIFT 2 /* MAIR attributes */ #define MAIR_ATTRIBUTES ((0x00 << (BLOCK_INDEX_MEM_DEV_NGNRNE*8)) | \ (0x04 << (BLOCK_INDEX_MEM_DEV_NGNRE*8)) | \ (0x0c << (BLOCK_INDEX_MEM_DEV_GRE*8)) | \ (0x44 << (BLOCK_INDEX_MEM_NORMAL_NC*8)) | \ (0xffUL << (BLOCK_INDEX_MEM_NORMAL*8))) /* TCR attributes */ #define TCR_TOSZ (64 - BITS_PER_VA) #define TCR_IRGN0_SHIFT 8 #define TCR_IRGN0_NM_NC (0x00 << TCR_IRGN0_SHIFT) #define TCR_IRGN0_NM_WBWAC (0x01 << TCR_IRGN0_SHIFT) #define TCR_IRGN0_NM_WTC (0x02 << TCR_IRGN0_SHIFT) #define TCR_IRGN0_NM_WBNWAC (0x03 << TCR_IRGN0_SHIFT) #define TCR_ORGN0_SHIFT 10 #define TCR_ORGN0_NM_NC (0x00 << TCR_ORGN0_SHIFT) #define TCR_ORGN0_NM_WBWAC (0x01 << TCR_ORGN0_SHIFT) #define TCR_ORGN0_NM_WTC (0x02 << TCR_ORGN0_SHIFT) #define TCR_ORGN0_NM_WBNWAC (0x03 << TCR_ORGN0_SHIFT) #define TCR_SH0_SHIFT 12 #define TCR_SH0_NC (0x0 << TCR_SH0_SHIFT) #define TCR_SH0_OS (0x2 << TCR_SH0_SHIFT) #define TCR_SH0_IS (0x3 << TCR_SH0_SHIFT) #define TCR_TG0_SHIFT 14 #define TCR_TG0_4KB (0x0 << TCR_TG0_SHIFT) #define TCR_TG0_64KB (0x1 << TCR_TG0_SHIFT) #define TCR_TG0_16KB (0x2 << TCR_TG0_SHIFT) #define TCR_PS_SHIFT 16 #define TCR_PS_4GB (0x0 << TCR_PS_SHIFT) #define TCR_PS_64GB (0x1 << TCR_PS_SHIFT) #define TCR_PS_1TB (0x2 << TCR_PS_SHIFT) #define TCR_PS_4TB (0x3 << TCR_PS_SHIFT) #define TCR_PS_16TB (0x4 << TCR_PS_SHIFT) #define TCR_PS_256TB (0x5 << TCR_PS_SHIFT) #define TCR_TBI_SHIFT 20 #define TCR_TBI_USED (0x0 << TCR_TBI_SHIFT) #define TCR_TBI_IGNORED (0x1 << TCR_TBI_SHIFT) #define DMA_DEFAULT_SIZE (0x20 * GRANULE_SIZE) #define TTB_DEFAULT_SIZE 0x100000 /* Initialize the MMU TTB tables using the mmu_ranges */ uint64_t mmu_init(struct mmu_ranges *mmu_ranges); /* Enable the mmu based on previous mmu_init(). */ void mmu_enable(void); /* Disable mmu */ void mmu_disable(void); /* * Based on the memory ranges provided in coreboot tables, * initialize the mmu_memranges used for mmu initialization * cb_ranges -> Memory ranges present in cb tables * mmu_ranges -> mmu_memranges initialized by this function */ struct mmu_memrange* mmu_init_ranges_from_sysinfo(struct memrange *cb_ranges, uint64_t ncb, struct mmu_ranges *mmu_ranges); /* Add a new mmu_memrange */ struct mmu_memrange* mmu_add_memrange(struct mmu_ranges *r, uint64_t base, uint64_t size, uint64_t type); /* * Functions for handling the initialization of memory ranges and enabling mmu * before coreboot tables are parsed */ void mmu_presysinfo_memory_used(uint64_t base, uint64_t size); void mmu_presysinfo_enable(void); #endif // __ARCH_ARM64_MMU_H__