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Atmosphere/exosphere/mmu.h
Lioncash b4229f0fa8
mmu: Remove phys_addr parameter from mmu_unmap_range 
It's unused
2018-02-23 09:25:21 -05:00

261 lines
8.8 KiB
C
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#ifndef EXOSPHERE_MMU_H
#define EXOSPHERE_MMU_H
#include <stdbool.h>
#include <stdint.h>
#include <stddef.h>
#include "utils.h"
#ifndef MMU_GRANULE_TYPE
#define MMU_GRANULE_TYPE 0 /* 0: 4KB, 1: 64KB, 2: 16KB. The Switch always uses a 4KB granule size. */
#endif
#if MMU_GRANULE_TYPE == 0
#define MMU_Lx_SHIFT(x) (12 + 9 * (3 - (x)))
#define MMU_Lx_MASK(x) (BIT(9) - 1)
#elif MMU_GRANULE_TYPE == 1
/* 64 KB, no L0 here */
#define MMU_Lx_SHIFT(x) (16 + 13 * (3 - (x)))
#define MMU_Lx_MASK(x) ((x) == 1 ? (BIT(5) - 1) : (BIT(13) - 1))
#elif MMU_GRANULE_TYPE == 2
#define MMU_Lx_SHIFT(x) (14 + 11 * (3 - (x)))
#define MMU_Lx_MASK(x) ((x) == 0 ? 1 : (BIT(11) - 1))
#endif
/*
* The following defines are adapted from uboot:
*
* (C) Copyright 2013
* David Feng <fenghua@phytium.com.cn>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#define MMU_MT_DEVICE_NGNRNE 0
#define MMU_MT_DEVICE_NGNRE 1
#define MMU_MT_DEVICE_GRE 2
#define MMU_MT_NORMAL_NC 3
#define MMU_MT_NORMAL 4
/*
* Hardware page table definitions.
*
*/
#define MMU_PTE_TYPE_MASK 3
#define MMU_PTE_TYPE_FAULT 0
#define MMU_PTE_TYPE_TABLE 3
#define MMU_PTE_TYPE_BLOCK 1
/* L3 only */
#define MMU_PTE_TYPE_PAGE 1
#define MMU_PTE_TABLE_PXN BITL(59)
#define MMU_PTE_TABLE_XN BITL(60)
#define MMU_PTE_TABLE_AP BITL(61)
#define MMU_PTE_TABLE_NS BITL(63)
/*
* Block
*/
#define MMU_PTE_BLOCK_MEMTYPE(x) ((x) << 2)
#define MMU_PTE_BLOCK_NS BIT(5)
#define MMU_PTE_BLOCK_NON_SHAREABLE (0 << 8)
#define MMU_PTE_BLOCK_OUTER_SHAREABLE (2 << 8)
#define MMU_PTE_BLOCK_INNER_SHAREBLE (3 << 8)
#define MMU_PTE_BLOCK_AF BIT(10)
#define MMU_PTE_BLOCK_NG BIT(11)
#define MMU_PTE_BLOCK_PXN BITL(53)
#define MMU_PTE_BLOCK_UXN BITL(54)
#define MMU_PTE_BLOCK_XN MMU_PTE_BLOCK_UXN
/*
* AP[2:1]
*/
#define MMU_AP_PRIV_RW (0 << 6)
#define MMU_AP_RW (1 << 6)
#define MMU_AP_PRIV_RO (2 << 6)
#define MMU_AP_RO (3 << 6)
/*
* S2AP[2:1] (for stage2 translations; secmon doesn't use it)
*/
#define MMU_S2AP_NONE (0 << 6)
#define MMU_S2AP_RO (1 << 6)
#define MMU_S2AP_WO (2 << 6)
#define MMU_S2AP_RW (3 << 6)
/*
* AttrIndx[2:0]
*/
#define MMU_PMD_ATTRINDX(t) ((t) << 2)
#define MMU_PMD_ATTRINDX_MASK (7 << 2)
/*
* TCR flags.
*/
#define TCR_T0SZ(x) ((64 - (x)) << 0)
#define TCR_IRGN_NC (0 << 8)
#define TCR_IRGN_WBWA (1 << 8)
#define TCR_IRGN_WT (2 << 8)
#define TCR_IRGN_WBNWA (3 << 8)
#define TCR_IRGN_MASK (3 << 8)
#define TCR_ORGN_NC (0 << 10)
#define TCR_ORGN_WBWA (1 << 10)
#define TCR_ORGN_WT (2 << 10)
#define TCR_ORGN_WBNWA (3 << 10)
#define TCR_ORGN_MASK (3 << 10)
#define TCR_NOT_SHARED (0 << 12)
#define TCR_SHARED_OUTER (2 << 12)
#define TCR_SHARED_INNER (3 << 12)
#define TCR_TG0_4K (0 << 14)
#define TCR_TG0_64K (1 << 14)
#define TCR_TG0_16K (2 << 14)
#define TCR_EPD1_DISABLE BIT(23)
#define TCR_EL1_RSVD BIT(31)
#define TCR_EL2_RSVD (BIT(31) | BIT(23))
#define TCR_EL3_RSVD (BIT(31) | BIT(23))
static inline void mmu_init_table(uintptr_t *tbl, size_t num_entries) {
for(size_t i = 0; i < num_entries; i++) {
tbl[i] = MMU_PTE_TYPE_FAULT;
}
}
/*
All the functions below assume base_addr is valid.
They do not invalidate the TLB, which must be done separately.
*/
static inline unsigned int mmu_compute_index(unsigned int level, uintptr_t base_addr) {
return (base_addr >> MMU_Lx_SHIFT(level)) & MMU_Lx_MASK(level);
}
static inline void mmu_map_table(unsigned int level, uintptr_t *tbl, uintptr_t base_addr, uintptr_t *next_lvl_tbl_pa, uint64_t attrs) {
tbl[mmu_compute_index(level, base_addr)] = (uintptr_t)next_lvl_tbl_pa | attrs | MMU_PTE_TYPE_TABLE;
}
static inline void mmu_map_block(unsigned int level, uintptr_t *tbl, uintptr_t base_addr, uintptr_t phys_addr, uint64_t attrs) {
tbl[mmu_compute_index(level, base_addr)] = phys_addr | attrs | MMU_PTE_BLOCK_AF | MMU_PTE_TYPE_BLOCK;
}
static inline void mmu_map_page(uintptr_t *tbl, uintptr_t base_addr, uintptr_t phys_addr, uint64_t attrs) {
tbl[mmu_compute_index(3, base_addr)] = phys_addr | attrs | MMU_PTE_BLOCK_AF | MMU_PTE_TYPE_PAGE;
}
static inline void mmu_unmap(unsigned int level, uintptr_t *tbl, uintptr_t base_addr) {
tbl[mmu_compute_index(level, base_addr)] = MMU_PTE_TYPE_FAULT;
}
static inline void mmu_map_block_range(unsigned int level, uintptr_t *tbl, uintptr_t base_addr, uintptr_t phys_addr, size_t size, uint64_t attrs) {
size = (size >> MMU_Lx_SHIFT(level)) << MMU_Lx_SHIFT(level);
for(size_t offset = 0; offset < size; offset += MMU_Lx_SHIFT(level)) {
mmu_map_block(level, tbl, base_addr + offset, phys_addr + offset, attrs);
}
}
static inline void mmu_map_page_range(uintptr_t *tbl, uintptr_t base_addr, uintptr_t phys_addr, size_t size, uint64_t attrs) {
size = (size >> MMU_Lx_SHIFT(3)) << MMU_Lx_SHIFT(3);
for(size_t offset = 0; offset < size; offset += MMU_Lx_SHIFT(3)) {
mmu_map_page(tbl, base_addr + offset, phys_addr + offset, attrs);
}
}
static inline void mmu_unmap_range(unsigned int level, uintptr_t *tbl, uintptr_t base_addr, size_t size) {
size = (size >> MMU_Lx_SHIFT(level)) << MMU_Lx_SHIFT(level);
for(size_t offset = 0; offset < size; offset += MMU_Lx_SHIFT(level)) {
mmu_unmap(level, tbl, base_addr + offset);
}
}
/* Switch specific stuff */
static const struct {
uintptr_t pa;
size_t size;
bool is_secure;
} devices[] =
{
{ 0x50041000, 0x1000, true }, /* ARM Interrupt Distributor */
{ 0x50042000, 0x2000, true }, /* Interrupt Controller Physical CPU interface */
{ 0x70006000, 0x1000, false }, /* UART-A */
{ 0x60006000, 0x1000, false }, /* Clock and Reset */
{ 0x7000E000, 0x1000, true }, /* RTC, PMC */
{ 0x60005000, 0x1000, true }, /* TMRs, WDTs */
{ 0x6000C000, 0x1000, true }, /* System Registers */
{ 0x70012000, 0x2000, true }, /* SE */
{ 0x700F0000, 0x1000, true }, /* SYSCTR0 */
{ 0x70019000, 0x1000, true }, /* MC */
{ 0x7000F000, 0x1000, true }, /* FUSE (0x7000F800) */
{ 0x70000000, 0x4000, true }, /* MISC */
{ 0x60007000, 0x1000, true }, /* Flow Controller */
{ 0x40002000, 0x1000, true }, /* iRAM-A */
{ 0x7000D000, 0x1000, true }, /* I2C-5,6 - SPI 2B-1 to 4 */
{ 0x6000D000, 0x1000, true }, /* GPIO-1 - GPIO-8 */
{ 0x7000C000, 0x1000, true }, /* I2C-I2C4 */
{ 0x6000F000, 0x1000, true }, /* Exception vectors */
};
#define MMIO_DEVID_GICD 0
#define MMIO_DEVID_ICC 1
#define MMIO_DEVID_UART_A 2
#define MMIO_DEVID_CLKRST 3
#define MMIO_DEVID_RTC_PMC 4
#define MMIO_DEVID_TMRs_WDTs 5
#define MMIO_DEVID_SYSREGS 6
#define MMIO_DEVID_SE 7
#define MMIO_DEVID_SYSCTR0 8
#define MMIO_DEVID_MC 9
#define MMIO_DEVID_FUSE 10
#define MMIO_DEVID_MISC 11
#define MMIO_DEVID_FLOWCTRL 12
#define MMIO_DEVID_NXBOOTLOADER_MAILBOX 13
#define MMIO_DEVID_I2C56_SPI2B 14
#define MMIO_DEVID_GPIO 15
#define MMIO_DEVID_DTV_I2C234 16
#define MMIO_DEVID_EXCEPTION_VECTORS 17
#ifndef MMIO_USE_IDENTIY_MAPPING
#define MMIO_BASE 0x1F0080000ull
static inline uintptr_t mmio_get_device_address(unsigned int device_id) {
size_t offset = 0;
for(unsigned int i = 0; i < device_id; i++) {
offset += devices[i].size;
offset += 0x1000; /* guard page */
}
return MMIO_BASE + offset;
}
#else
static inline uintptr_t mmio_get_device_address(unsigned int devid) {
return devices[devid];
}
#endif
static inline void mmio_map_all_devices(uintptr_t *mmu_l3_tbl) {
static const uint64_t secure_device_attributes = MMU_PTE_BLOCK_XN | MMU_PTE_BLOCK_INNER_SHAREBLE | MMU_PTE_BLOCK_MEMTYPE(1);
static const uint64_t device_attributes = MMU_PTE_TABLE_NS | secure_device_attributes;
for(size_t i = 0, offset = 0; i < sizeof(devices) / sizeof(devices[0]); i++) {
uint64_t attributes = devices[i].is_secure ? secure_device_attributes : device_attributes;
mmu_map_page_range(mmu_l3_tbl, MMIO_BASE + offset, devices[i].pa, devices[i].size, attributes);
offset += devices[i].size;
offset += 0x1000; /* insert guard page */
}
}
static inline void mmio_unmap_all_devices(uintptr_t *mmu_l3_tbl) {
for(size_t i = 0, offset = 0; i < sizeof(devices) / sizeof(devices[0]); i++) {
mmu_unmap_range(3, mmu_l3_tbl, MMIO_BASE + offset, devices[i].size);
offset += devices[i].size;
offset += 0x1000; /* insert guard page */
}
}
#endif
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