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[libcpu][aarch64] 使用设备树对内存进行初始化 (#8320)

This commit is contained in:
fangjianzhou 2023-12-16 18:08:11 +08:00 committed by GitHub
parent 6b22a0a2b7
commit b233e29bb6
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GPG Key ID: 4AEE18F83AFDEB23
11 changed files with 540 additions and 414 deletions
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96
bsp/qemu-virt64-aarch64/drivers/board.c
View File

@ -11,104 +11,22 @@
* add smp ipi init
*/
#include <rthw.h>
#include <rtthread.h>
#include <mmu.h>
#include <gtimer.h>
#ifdef RT_USING_SMART
#include <lwp_arch.h>
#endif
#include "board.h"
#include <board.h>
#include <mm_aspace.h>
#include <mm_page.h>
#include <interrupt.h>
#include <setup.h>
#ifdef RT_USING_SMART
struct mem_desc platform_mem_desc[] = {
{KERNEL_VADDR_START, KERNEL_VADDR_START + 0x0fffffff, (rt_size_t)ARCH_MAP_FAILED, NORMAL_MEM}
};
#else
#define PAGE_POOL_SIZE (2ul << 20)
#define PHYMEM_END (0x48000000ul)
struct mem_desc platform_mem_desc[] =
{
{0x40000000, PHYMEM_END - 1, 0x40000000, NORMAL_MEM},
// {PL031_RTC_BASE, PL031_RTC_BASE + 0x1000 - 1, PL031_RTC_BASE, DEVICE_MEM},
// {PL061_GPIO_BASE, PL061_GPIO_BASE + 0x1000 - 1, PL061_GPIO_BASE, DEVICE_MEM},
{PL011_UART0_BASE, PL011_UART0_BASE + ARCH_SECTION_SIZE - 1, PL011_UART0_BASE, DEVICE_MEM},
{VIRTIO_MMIO_BASE, RT_ALIGN(VIRTIO_MMIO_BASE + VIRTIO_MAX_NR * VIRTIO_MMIO_SIZE, ARCH_SECTION_SIZE) - 1, VIRTIO_MMIO_BASE, DEVICE_MEM},
#ifdef BSP_USING_GICV2
{GIC_PL390_DISTRIBUTOR_PPTR, GIC_PL390_DISTRIBUTOR_PPTR + ARCH_SECTION_SIZE - 1, GIC_PL390_DISTRIBUTOR_PPTR, DEVICE_MEM},
#endif
#ifdef BSP_USING_GICV3
{GIC_PL500_DISTRIBUTOR_PPTR, GIC_PL500_DISTRIBUTOR_PPTR + 0x1000 - 1, GIC_PL500_DISTRIBUTOR_PPTR, DEVICE_MEM},
{GIC_PL500_REDISTRIBUTOR_PPTR, GIC_PL500_REDISTRIBUTOR_PPTR + 0xf60000 - 1, GIC_PL500_REDISTRIBUTOR_PPTR, DEVICE_MEM},
#endif
};
#endif
const rt_uint32_t platform_mem_desc_size = sizeof(platform_mem_desc)/sizeof(platform_mem_desc[0]);
void idle_wfi(void)
{
asm volatile ("wfi");
}
/**
* This function will initialize board
*/
extern size_t MMUTable[];
#ifdef RT_USING_SMART
rt_region_t init_page_region = {
PAGE_START,
PAGE_END,
};
#else
rt_region_t init_page_region = {
PHYMEM_END - PAGE_POOL_SIZE,
PHYMEM_END,
};
#endif
void rt_hw_board_init(void)
{
#ifdef RT_USING_SMART
rt_hw_mmu_map_init(&rt_kernel_space, (void*)0xfffffffff0000000, 0x10000000, MMUTable, PV_OFFSET);
#else
rt_hw_mmu_map_init(&rt_kernel_space, (void*)0x80000000, 0x10000000, MMUTable, 0);
#endif
rt_page_init(init_page_region);
rt_hw_mmu_setup(&rt_kernel_space, platform_mem_desc, platform_mem_desc_size);
rt_fdt_commit_memregion_early(&(rt_region_t)
{
.name = "memheap",
.start = (rt_size_t)rt_kmem_v2p(HEAP_BEGIN),
.end = (rt_size_t)rt_kmem_v2p(HEAP_END),
}, RT_TRUE);
/* initialize system heap */
rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
/* initialize hardware interrupt */
rt_hw_interrupt_init();
rt_hw_gtimer_init();
/* support debug feature before components init */
rt_hw_uart_init();
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#ifdef RT_USING_OFW
rt_hw_common_setup();
#endif
rt_components_board_init();
rt_thread_idle_sethook(idle_wfi);
#ifdef RT_USING_SMP
/* install IPI handle */
rt_hw_ipi_handler_install(RT_SCHEDULE_IPI, rt_scheduler_ipi_handler);
#endif
}

8
bsp/qemu-virt64-aarch64/drivers/board.h
View File

@ -18,15 +18,7 @@ extern unsigned char __bss_start;
extern unsigned char __bss_end;
#define HEAP_BEGIN (void *)&__bss_end
#ifdef RT_USING_SMART
#define HEAP_END (rt_size_t)(KERNEL_VADDR_START + 64 * 1024 * 1024)
#define PAGE_START HEAP_END + 1 * 1024 * 1024
#define PAGE_END ((rt_size_t)KERNEL_VADDR_START + 128 * 1024 * 1024)
#else
#define HEAP_END ((void *)HEAP_BEGIN + 64 * 1024 * 1024)
#define KERNEL_VADDR_START 0x40000000
#endif
void rt_hw_board_init(void);

2
bsp/qemu-virt64-aarch64/drivers/drv_gpio.c
View File

@ -305,9 +305,7 @@ int rt_hw_gpio_init(void)
rt_spin_lock_init(&_pl061.spinlock);
#endif
#ifdef RT_USING_LWP
pl061_gpio_base = (rt_size_t)rt_ioremap((void *)pl061_gpio_base, PL061_GPIO_SIZE);
#endif
rt_device_pin_register("gpio", &ops, RT_NULL);
rt_hw_interrupt_install(PL061_GPIO_IRQNUM, rt_hw_gpio_isr, RT_NULL, "gpio");

2
bsp/qemu-virt64-aarch64/drivers/drv_rtc.c
View File

@ -102,9 +102,7 @@ const static struct rt_device_ops pl031_rtc_ops =
int rt_hw_rtc_init(void)
{
#ifdef RT_USING_LWP
pl031_rtc_base = (rt_size_t)rt_ioremap((void *)pl031_rtc_base, PL031_RTC_SIZE);
#endif
rt_memset(&rtc_device, 0, sizeof(rtc_device));

2
bsp/qemu-virt64-aarch64/drivers/drv_virtio.c
View File

@ -62,14 +62,12 @@ int rt_virtio_devices_init(void)
return 0;
}
#ifdef RT_USING_LWP
mmio_base = (rt_ubase_t)rt_ioremap((void *)mmio_base, VIRTIO_MMIO_SIZE * VIRTIO_MAX_NR);
if (mmio_base == RT_NULL)
{
return -RT_ERROR;
}
#endif
for (i = 0; i < VIRTIO_MAX_NR; ++i, ++irq, mmio_base += VIRTIO_MMIO_SIZE)
{

23
components/mm/ioremap.c
View File

@ -18,8 +18,9 @@ void *rt_ioremap_start;
size_t rt_ioremap_size;
#ifdef RT_USING_SMART
#include <lwp_mm.h>
#endif
#define DBG_TAG "mm.ioremap"
#define DBG_LVL DBG_LOG
#include <rtdbg.h>
@ -111,23 +112,3 @@ void rt_iounmap(volatile void *vaddr)
rt_aspace_unmap(&rt_kernel_space, (void *)vaddr);
}
#else
void *rt_ioremap(void *paddr, size_t size)
{
return paddr;
}
void *rt_ioremap_nocache(void *paddr, size_t size)
{
return paddr;
}
void *rt_ioremap_cached(void *paddr, size_t size)
{
return paddr;
}
void rt_iounmap(volatile void *vaddr)
{
}
#endif

2
libcpu/aarch64/common/interrupt.c
View File

@ -104,7 +104,7 @@ void rt_hw_interrupt_init(void)
rt_memset(isr_table, 0x00, sizeof(isr_table));
/* initialize ARM GIC */
#ifdef RT_USING_SMART
#if defined(RT_USING_SMART) || defined(RT_USING_OFW)
gic_dist_base = (rt_uint64_t)rt_ioremap((void*)platform_get_gic_dist_base(), 0x40000);
gic_cpu_base = (rt_uint64_t)rt_ioremap((void*)platform_get_gic_cpu_base(), 0x1000);
#ifdef BSP_USING_GICV3

47
libcpu/aarch64/common/mmu.c
View File

@ -15,13 +15,15 @@
#include <stdint.h>
#include <string.h>
#define __MMU_INTERNAL
#include "mm_aspace.h"
#include "mm_page.h"
#include "mmu.h"
#include "tlb.h"
#ifdef RT_USING_SMART
#include "ioremap.h"
#ifdef RT_USING_SMART
#include <lwp_mm.h>
#endif
@ -45,6 +47,10 @@
#define MMU_TBL_PAGE_4k_LEVEL 3
#define MMU_TBL_LEVEL_NR 4
#ifndef KERNEL_VADDR_START
#define KERNEL_VADDR_START ARCH_TEXT_OFFSET
#endif
volatile unsigned long MMUTable[512] __attribute__((aligned(4 * 1024)));
struct mmu_level_info
@ -423,21 +429,13 @@ void rt_hw_mmu_setup(rt_aspace_t aspace, struct mem_desc *mdesc, int desc_nr)
rt_page_cleanup();
}
#ifdef RT_USING_SMART
static void _init_region(void *vaddr, size_t size)
{
rt_ioremap_start = vaddr;
rt_ioremap_size = size;
rt_mpr_start = (char *)rt_ioremap_start - rt_mpr_size;
}
#else
#define RTOS_VEND (0xfffffffff000UL)
static inline void _init_region(void *vaddr, size_t size)
{
rt_mpr_start = (void *)(RTOS_VEND - rt_mpr_size);
}
#endif
/**
* This function will initialize rt_mmu_info structure.
@ -476,12 +474,8 @@ int rt_hw_mmu_map_init(rt_aspace_t aspace, void *v_address, size_t size,
return -1;
}
#ifdef RT_USING_SMART
rt_aspace_init(aspace, (void *)KERNEL_VADDR_START, 0 - KERNEL_VADDR_START,
vtable);
#else
rt_aspace_init(aspace, (void *)0x1000, RTOS_VEND - 0x1000ul, vtable);
#endif
_init_region(v_address, size);
@ -497,10 +491,14 @@ int rt_hw_mmu_map_init(rt_aspace_t aspace, void *v_address, size_t size,
void mmu_tcr_init(void)
{
unsigned long val64;
unsigned long pa_range;
val64 = 0x00447fUL;
__asm__ volatile("msr MAIR_EL1, %0\n dsb sy\n" ::"r"(val64));
__asm__ volatile ("mrs %0, ID_AA64MMFR0_EL1":"=r"(val64));
pa_range = val64 & 0xf; /* PARange */
/* TCR_EL1 */
val64 = (16UL << 0) /* t0sz 48bit */
| (0x0UL << 6) /* reserved */
@ -516,7 +514,7 @@ void mmu_tcr_init(void)
| (0x3UL << 26) /* t1 outer wb cacheable */
| (0x2UL << 28) /* t1 outer shareable */
| (0x2UL << 30) /* t1 4k */
| (0x1UL << 32) /* 001b 64GB PA */
| (pa_range << 32) /* PA range */
| (0x0UL << 35) /* reserved */
| (0x1UL << 36) /* as: 0:8bit 1:16bit */
| (0x0UL << 37) /* tbi0 */
@ -530,17 +528,21 @@ struct page_table
};
/* */
static struct page_table __init_page_array[6] rt_align(0x1000);
static unsigned long __page_off = 2UL; /* 0, 1 for ttbr0, ttrb1 */
static struct page_table* __init_page_array;
static unsigned long __page_off = 0UL;
unsigned long get_ttbrn_base(void)
{
return (unsigned long) __init_page_array;
}
void set_free_page(void *page_array)
{
__init_page_array = page_array;
}
unsigned long get_free_page(void)
{
__page_off++;
return (unsigned long) (__init_page_array[__page_off - 1].page);
return (unsigned long) (__init_page_array[__page_off++].page);
}
static int _map_single_page_2M(unsigned long *lv0_tbl, unsigned long va,
@ -594,6 +596,7 @@ static int _map_single_page_2M(unsigned long *lv0_tbl, unsigned long va,
void *rt_ioremap_early(void *paddr, size_t size)
{
size_t count;
rt_ubase_t base;
static void *tbl = RT_NULL;
if (!size)
@ -607,10 +610,16 @@ void *rt_ioremap_early(void *paddr, size_t size)
}
count = (size + ARCH_SECTION_MASK) >> ARCH_SECTION_SHIFT;
base = (rt_ubase_t)paddr & (~ARCH_SECTION_MASK);
while (count --> 0)
{
_map_single_page_2M(tbl, (unsigned long)paddr, (unsigned long)paddr, MMU_MAP_K_DEVICE);
if (_map_single_page_2M(tbl, base, base, MMU_MAP_K_DEVICE))
{
return RT_NULL;
}
base += ARCH_SECTION_SIZE;
}
return paddr;

11
libcpu/aarch64/common/mmu.h
View File

@ -11,6 +11,8 @@
#ifndef __MMU_H_
#define __MMU_H_
#ifndef __ASSEMBLY__
#include <rtthread.h>
#include <mm_aspace.h>
@ -30,6 +32,8 @@ struct mem_desc
struct rt_varea varea;
};
#endif /* !__ASSEMBLY__ */
#define RT_HW_MMU_PROT_READ 1
#define RT_HW_MMU_PROT_WRITE 2
#define RT_HW_MMU_PROT_EXECUTE 4
@ -85,6 +89,8 @@ struct mem_desc
#define ARCH_MAP_FAILED ((void *)0x1ffffffffffff)
#ifndef __ASSEMBLY__
struct rt_aspace;
void rt_hw_mmu_ktbl_set(unsigned long tbl);
@ -93,8 +99,7 @@ void rt_hw_mem_setup_early(unsigned long *tbl0, unsigned long *tbl1,
void rt_hw_mmu_setup(struct rt_aspace *aspace, struct mem_desc *mdesc,
int desc_nr);
int rt_hw_mmu_map_init(struct rt_aspace *aspace, void *v_address,
rt_size_t size, rt_size_t *vtable, rt_size_t pv_off);
int rt_hw_mmu_map_init(rt_aspace_t aspace, void *v_address, size_t size, size_t *vtable, size_t pv_off);
void *rt_hw_mmu_map(struct rt_aspace *aspace, void *v_addr, void *p_addr,
size_t size, size_t attr);
void rt_hw_mmu_unmap(struct rt_aspace *aspace, void *v_addr, size_t size);
@ -204,4 +209,6 @@ rt_inline rt_bool_t rt_hw_mmu_attr_test_perm(size_t attr, rt_base_t prot)
int rt_hw_mmu_control(struct rt_aspace *aspace, void *vaddr, size_t size,
enum rt_mmu_cntl cmd);
#endif /* !__ASSEMBLY__ */
#endif

239
libcpu/aarch64/common/setup.c
View File

@ -18,7 +18,8 @@
#include <mmu.h>
#include <cpuport.h>
#include <interrupt.h>
#include <gtimer.h>
#include <setup.h>
#include <stdlib.h>
#include <ioremap.h>
#include <drivers/ofw.h>
@ -31,13 +32,18 @@
#define rt_sysreg_read(sysreg, val) \
__asm__ volatile ("mrs %0, "RT_STRINGIFY(sysreg)"":"=r"((val)))
#define SIZE_KB 1024
#define SIZE_MB (1024 * SIZE_KB)
#define SIZE_GB (1024 * SIZE_MB)
extern rt_ubase_t _start, _end;
extern void _secondary_cpu_entry(void);
extern size_t MMUTable[];
extern void *system_vectors;
static void *fdt_ptr = RT_NULL;
static rt_size_t fdt_size = 0;
static rt_uint64_t initrd_ranges[3] = { };
#ifdef RT_USING_SMP
extern struct cpu_ops_t cpu_psci_ops;
@ -63,15 +69,18 @@ static struct rt_ofw_node *cpu_np[RT_CPUS_NR] = { };
void rt_hw_fdt_install_early(void *fdt)
{
void *fdt_vaddr = fdt - PV_OFFSET;
if (fdt != RT_NULL && !fdt_check_header(fdt_vaddr))
if (fdt != RT_NULL && !fdt_check_header(fdt))
{
fdt_ptr = fdt_vaddr;
fdt_size = fdt_totalsize(fdt_vaddr);
fdt_ptr = fdt;
fdt_size = fdt_totalsize(fdt);
}
}
rt_weak void rt_hw_idle_wfi(void)
{
__asm__ volatile ("wfi");
}
static void system_vectors_init(void)
{
rt_hw_set_current_vbar((rt_ubase_t)&system_vectors);
@ -124,17 +133,235 @@ rt_inline void cpu_info_init(void)
rt_hw_cpu_dcache_ops(RT_HW_CACHE_FLUSH, rt_cpu_mpidr_table, sizeof(rt_cpu_mpidr_table));
}
rt_inline rt_bool_t is_kernel_aspace(const char *name)
{
static char * const names[] =
{
"kernel",
"memheap",
};
if (!name)
{
return RT_FALSE;
}
for (int i = 0; i < RT_ARRAY_SIZE(names); ++i)
{
if (!rt_strcmp(names[i], name))
{
return RT_TRUE;
}
}
return RT_FALSE;
}
void rt_hw_common_setup(void)
{
rt_size_t mem_region_nr;
rt_region_t *mem_region;
rt_size_t page_best_start;
rt_region_t platform_mem_region;
static struct mem_desc platform_mem_desc;
void *kernel_start, *kernel_end, *memheap_start = RT_NULL, *memheap_end = RT_NULL;
#ifdef RT_USING_SMART
rt_hw_mmu_map_init(&rt_kernel_space, (void*)0xfffffffff0000000, 0x10000000, MMUTable, PV_OFFSET);
#else
rt_hw_mmu_map_init(&rt_kernel_space, (void*)0xffffd0000000, 0x10000000, MMUTable, 0);
#endif
kernel_start = rt_kmem_v2p((void *)&_start) - 64;
kernel_end = rt_kmem_v2p((void *)&_end);
if (!rt_fdt_commit_memregion_request(&mem_region, &mem_region_nr, RT_TRUE))
{
const char *name = "memheap";
while (mem_region_nr --> 0)
{
if (mem_region->name == name || !rt_strcmp(mem_region->name, name))
{
memheap_start = (void *)mem_region->start;
memheap_end = (void *)mem_region->end;
break;
}
}
}
page_best_start = (rt_size_t)(memheap_end ? : kernel_end);
if (memheap_end && fdt_ptr > kernel_start)
{
rt_memmove(memheap_end - PV_OFFSET, fdt_ptr - PV_OFFSET, fdt_size);
fdt_ptr = memheap_end;
page_best_start = (rt_size_t)fdt_ptr + fdt_size;
}
rt_fdt_commit_memregion_early(&(rt_region_t)
{
.name = "fdt",
.start = (rt_size_t)fdt_ptr,
.end = (rt_size_t)(fdt_ptr + fdt_size),
}, RT_TRUE);
fdt_ptr -= PV_OFFSET;
rt_fdt_commit_memregion_early(&(rt_region_t)
{
.name = "kernel",
.start = (rt_size_t)kernel_start,
.end = (rt_size_t)kernel_end,
}, RT_TRUE);
if (rt_fdt_prefetch(fdt_ptr))
{
/* Platform cannot be initialized */
RT_ASSERT(0);
}
rt_fdt_scan_chosen_stdout();
rt_fdt_scan_initrd(initrd_ranges);
rt_fdt_scan_memory();
if (memheap_start && memheap_end)
{
rt_system_heap_init(memheap_start - PV_OFFSET, memheap_end - PV_OFFSET);
}
platform_mem_region.start = ~0UL;
platform_mem_region.end = 0;
if (!rt_fdt_commit_memregion_request(&mem_region, &mem_region_nr, RT_TRUE))
{
LOG_I("Reserved memory:");
while (mem_region_nr --> 0)
{
if (is_kernel_aspace(mem_region->name))
{
if (platform_mem_region.start > mem_region->start)
{
platform_mem_region.start = mem_region->start;
}
if (platform_mem_region.end < mem_region->end)
{
platform_mem_region.end = mem_region->end;
}
}
LOG_I(" %-*.s [%p, %p]", RT_NAME_MAX, mem_region->name, mem_region->start, mem_region->end);
++mem_region;
}
}
if (!rt_fdt_commit_memregion_request(&mem_region, &mem_region_nr, RT_FALSE))
{
rt_ubase_t best_offset = ~0UL;
rt_region_t *usable_mem_region = mem_region, *page_region = RT_NULL, init_page_region = { 0 };
LOG_I("Usable memory:");
for (int i = 0; i < mem_region_nr; ++i, ++mem_region)
{
if (!mem_region->name)
{
continue;
}
if (platform_mem_region.start > mem_region->start)
{
platform_mem_region.start = mem_region->start;
}
if (platform_mem_region.end < mem_region->end)
{
platform_mem_region.end = mem_region->end;
}
if (mem_region->start >= page_best_start &&
mem_region->start - page_best_start < best_offset &&
/* MUST >= 1MB */
mem_region->end - mem_region->start >= SIZE_MB)
{
page_region = mem_region;
best_offset = page_region->start - page_best_start;
}
LOG_I(" %-*.s [%p, %p]", RT_NAME_MAX, mem_region->name, mem_region->start, mem_region->end);
}
RT_ASSERT(page_region != RT_NULL);
init_page_region.start = page_region->start - PV_OFFSET;
init_page_region.end = page_region->end - PV_OFFSET;
rt_page_init(init_page_region);
platform_mem_region.start = RT_ALIGN(platform_mem_region.start, ARCH_PAGE_SIZE);
platform_mem_region.end = RT_ALIGN_DOWN(platform_mem_region.end, ARCH_PAGE_SIZE);
RT_ASSERT(platform_mem_region.end - platform_mem_region.start != 0);
platform_mem_desc.paddr_start = platform_mem_region.start;
platform_mem_desc.vaddr_start = platform_mem_region.start - PV_OFFSET;
platform_mem_desc.vaddr_end = platform_mem_region.end - PV_OFFSET - 1;
platform_mem_desc.attr = NORMAL_MEM;
rt_hw_mmu_setup(&rt_kernel_space, &platform_mem_desc, 1);
rt_fdt_earlycon_kick(FDT_EARLYCON_KICK_UPDATE);
mem_region = usable_mem_region;
for (int i = 0; i < mem_region_nr; ++i, ++mem_region)
{
if (mem_region != page_region)
{
rt_page_install(*mem_region);
}
}
}
rt_fdt_unflatten();
cpu_info_init();
/* initialize hardware interrupt */
rt_hw_interrupt_init();
/* initialize uart */
rt_hw_uart_init();
/* initialize timer for os tick */
rt_hw_gtimer_init();
#ifdef RT_USING_COMPONENTS_INIT
rt_components_board_init();
#endif
#if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
rt_ofw_console_setup();
#endif
rt_thread_idle_sethook(rt_hw_idle_wfi);
#ifdef RT_USING_SMP
/* Install the IPI handle */
rt_hw_ipi_handler_install(RT_SCHEDULE_IPI, rt_scheduler_ipi_handler);
rt_hw_ipi_handler_install(RT_STOP_IPI, rt_scheduler_ipi_handler);
rt_hw_interrupt_umask(RT_SCHEDULE_IPI);
rt_hw_interrupt_umask(RT_STOP_IPI);
#endif
}
#ifdef RT_USING_SMP

498
libcpu/aarch64/cortex-a/entry_point.S
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2006-2020, RT-Thread Development Team
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
@ -9,7 +9,46 @@
* 2023-04-29 GuEe-GUI support kernel's ARM64 boot header
*/
#include "rtconfig.h"
#ifndef __ASSEMBLY__
#define __ASSEMBLY__
#endif
#include <mmu.h>
#include <rtconfig.h>
#define ARM64_IMAGE_FLAG_BE_SHIFT 0
#define ARM64_IMAGE_FLAG_PAGE_SIZE_SHIFT (ARM64_IMAGE_FLAG_BE_SHIFT + 1)
#define ARM64_IMAGE_FLAG_PHYS_BASE_SHIFT (ARM64_IMAGE_FLAG_PAGE_SIZE_SHIFT + 2)
#define ARM64_IMAGE_FLAG_LE 0
#define ARM64_IMAGE_FLAG_BE 1
#define ARM64_IMAGE_FLAG_PAGE_SIZE_4K 1
#define ARM64_IMAGE_FLAG_PAGE_SIZE_16K 2
#define ARM64_IMAGE_FLAG_PAGE_SIZE_64K 3
#define ARM64_IMAGE_FLAG_PHYS_BASE 1
#define _HEAD_FLAG(field) (_HEAD_FLAG_##field << ARM64_IMAGE_FLAG_##field##_SHIFT)
#ifdef ARCH_CPU_BIG_ENDIAN
#define _HEAD_FLAG_BE ARM64_IMAGE_FLAG_BE
#else
#define _HEAD_FLAG_BE ARM64_IMAGE_FLAG_LE
#endif
#define _HEAD_FLAG_PAGE_SIZE ((ARCH_PAGE_SHIFT - 10) / 2)
#define _HEAD_FLAG_PHYS_BASE 1
#define _HEAD_FLAGS (_HEAD_FLAG(BE) | _HEAD_FLAG(PAGE_SIZE) | _HEAD_FLAG(PHYS_BASE))
.macro get_phy, reg, symbol
adrp \reg, \symbol
add \reg, \reg, #:lo12:\symbol
.endm
.macro get_pvoff, tmp, out
ldr \tmp, =.boot_cpu_stack_top
get_phy \out, .boot_cpu_stack_top
sub \out, \out, \tmp
.endm
.section ".text.entrypoint","ax"
@ -24,7 +63,7 @@ _head:
.long 0 /* Executable code */
.quad _text_offset /* Image load offset from start of RAM, little endian */
.quad _end - _head /* Effective Image size, little endian (_end defined in link.lds) */
.quad 0xa /* Kernel flags, little endian */
.quad _HEAD_FLAGS /* Kernel flags, little endian */
.quad 0 /* Reserved */
.quad 0 /* Reserved */
.quad 0 /* Reserved */
@ -38,7 +77,7 @@ boot_arg1 .req x23
boot_arg2 .req x24
stack_top .req x25
.global _start
.global _start
_start:
/*
* Boot CPU general-purpose register settings:
@ -51,296 +90,255 @@ _start:
mov boot_arg0, x1
mov boot_arg1, x2
mov boot_arg2, x3
#ifdef ARCH_ARM_BOOTWITH_FLUSH_CACHE
bl __asm_flush_dcache_all
#endif
bl rt_hw_cpu_id_set
/* read cpu id, stop slave cores */
mrs x0, tpidr_el1
cbz x0, .L__cpu_0 /* .L prefix is the local label in ELF */
#ifndef RT_AMP_SLAVE
/* cpu id > 0, stop */
/* cpu id == 0 will also goto here after returned from entry() if possible */
.L__current_cpu_idle:
wfe
b .L__current_cpu_idle
#endif
/* Save cpu stack */
get_phy stack_top, .boot_cpu_stack_top
/* Save cpu id temp */
msr tpidr_el1, xzr
.L__cpu_0:
/* set stack before our code, Define stack pointer for current exception level */
adr x1, .el_stack_top
/* set up EL1 */
mrs x0, CurrentEL /* CurrentEL Register. bit 2, 3. Others reserved */
and x0, x0, #12 /* clear reserved bits */
/* running at EL3? */
cmp x0, #12 /* 1100b. So, EL3 */
bne .L__not_in_el3 /* 11? !EL3 -> 5: */
/* should never be executed, just for completeness. (EL3) */
mov x2, #0x5b1
msr scr_el3, x2 /* SCR_ELn Secure Configuration Register */
mov x2, #0x3c9
msr spsr_el3, x2 /* SPSR_ELn. Saved Program Status Register. 1111001001 */
adr x2, .L__not_in_el3
msr elr_el3, x2
eret /* Exception Return: from EL3, continue from .L__not_in_el3 */
.L__not_in_el3: /* running at EL2 or EL1 */
cmp x0, #4 /* 0x04 0100 EL1 */
beq .L__in_el1 /* EL1 -> 5: */
mrs x0, hcr_el2
bic x0, x0, #0xff
msr hcr_el2, x0
msr sp_el1, x1 /* in EL2, set sp of EL1 to _start */
/* enable CNTP for EL1 */
mrs x0, cnthctl_el2 /* Counter-timer Hypervisor Control register */
orr x0, x0, #3
msr cnthctl_el2, x0
msr cntvoff_el2, xzr
/* enable AArch64 in EL1 */
mov x0, #(1 << 31) /* AArch64 */
orr x0, x0, #(1 << 1) /* SWIO hardwired on Pi3 */
msr hcr_el2, x0
mrs x0, hcr_el2
/* change execution level to EL1 */
mov x2, #0x3c4
msr spsr_el2, x2 /* 1111000100 */
adr x2, .L__in_el1
msr elr_el2, x2
eret /* exception return. from EL2. continue from .L__in_el1 */
.macro GET_PHY reg, symbol
adrp \reg, \symbol
add \reg, \reg, #:lo12:\symbol
.endm
.L__in_el1:
mov sp, x1 /* in EL1. Set sp to _start */
/* Set CPACR_EL1 (Architecture Feature Access Control Register) to avoid trap from SIMD or float point instruction */
mov x1, #0x00300000 /* Don't trap any SIMD/FP instructions in both EL0 and EL1 */
msr cpacr_el1, x1
/* applying context change */
dsb ish
isb
/* clear bss */
GET_PHY x1, __bss_start
GET_PHY x2, __bss_end
sub x2, x2, x1 /* get bss size */
and x3, x2, #7 /* x3 is < 7 */
ldr x4, =~0x7
and x2, x2, x4 /* mask ~7 */
.L__clean_bss_loop:
cbz x2, .L__clean_bss_loop_1
str xzr, [x1], #8
sub x2, x2, #8
b .L__clean_bss_loop
.L__clean_bss_loop_1:
cbz x3, .L__jump_to_entry
strb wzr, [x1], #1
sub x3, x3, #1
b .L__clean_bss_loop_1
.L__jump_to_entry: /* jump to C code, should not return */
bl mmu_tcr_init
bl get_ttbrn_base
add x1, x0, #0x1000
msr ttbr0_el1, x0
msr ttbr1_el1, x1
dsb sy
#ifdef RT_USING_SMART
ldr x2, =_start
GET_PHY x3, _start
sub x3, x3, x2
#else
mov x3,0
#endif
ldr x2, =0x10000000 /* map 256M memory for kernel space */
bl rt_hw_mem_setup_early
ldr x30, =after_mmu_enable /* set LR to after_mmu_enable function, it's a v_addr */
mrs x1, sctlr_el1
bic x1, x1, #(3 << 3) /* dis SA, SA0 */
bic x1, x1, #(1 << 1) /* dis A */
orr x1, x1, #(1 << 12) /* I */
orr x1, x1, #(1 << 2) /* C */
orr x1, x1, #(1 << 0) /* M */
msr sctlr_el1, x1 /* enable MMU */
dsb ish
isb
ic ialluis /* Invalidate all instruction caches in Inner Shareable domain to Point of Unification */
dsb ish
isb
tlbi vmalle1 /* Invalidate all stage 1 translations used at EL1 with the current VMID */
dsb ish
isb
ret
after_mmu_enable:
#ifdef RT_USING_SMART
mrs x0, tcr_el1 /* disable ttbr0, only using kernel space */
orr x0, x0, #(1 << 7)
msr tcr_el1, x0
msr ttbr0_el1, xzr
dsb sy
#endif
mov x0, #1
msr spsel, x0
adr x1, .el_stack_top
mov sp, x1 /* sp_el1 set to _start */
bl init_cpu_el
bl init_kernel_bss
bl init_cpu_stack_early
#ifdef RT_USING_OFW
/* Save devicetree info */
mov x0, dtb_paddr
bl rt_hw_fdt_install_early
#endif
b rtthread_startup
/* Now we are in the end of boot cpu process */
ldr x8, =rtthread_startup
b init_mmu_early
kernel_start:
/* jump to the PE's system entry */
mov x29, xzr
mov x30, x8
br x8
cpu_idle:
wfe
b cpu_idle
#ifdef RT_USING_SMP
/**
* secondary cpu
*/
.global _secondary_cpu_entry
.globl _secondary_cpu_entry
_secondary_cpu_entry:
#ifdef RT_USING_OFW
/* Read cpu id */
mrs x5, mpidr_el1
ldr x1, =rt_cpu_mpidr_table
get_pvoff x4 x2
add x1, x1, x2
mov x2, #0
ldr x4, =0xff00ffffff
and x0, x5, x4
.cpu_id_confirm:
add x2, x2, #1 /* Next cpu id inc */
ldr x3, [x1], #8
cmp x3, #0
beq cpu_idle
and x3, x3, x4
cmp x3, x0
bne .cpu_id_confirm
/* Save this mpidr */
str x5, [x1, #-8]
/* Get cpu id success */
sub x0, x2, #1
msr tpidr_el1, x0 /* Save cpu id global */
#else
bl rt_hw_cpu_id_set
adr x1, .el_stack_top
mrs x0, tpidr_el1
#endif
/* set up EL1 */
/* Set current cpu's stack top */
sub x0, x0, #1
mov x1, #ARCH_SECONDARY_CPU_STACK_SIZE
get_phy x2, .secondary_cpu_stack_top
msub stack_top, x0, x1, x2
bl init_cpu_el
bl init_cpu_stack_early
/* secondary cpu start to startup */
ldr x8, =rt_hw_secondary_cpu_bsp_start
b enable_mmu_early
#endif /* RT_USING_SMP */
init_cpu_el:
mrs x0, CurrentEL /* CurrentEL Register. bit 2, 3. Others reserved */
and x0, x0, #12 /* clear reserved bits */
lsr x0, x0, #2
and x0, x0, #3
/* running at EL3? */
cmp x0, #12 /* 1100b. So, EL3 */
bne .L__not_in_el3_cpux /* 11? !EL3 -> 5: */
cmp x0, #3
bne .init_cpu_hyp
/* should never be executed, just for completeness. (EL3) */
mov x2, #0x5b1
msr scr_el3, x2 /* SCR_ELn Secure Configuration Register */
mov x2, #0x3c9
msr spsr_el3, x2 /* SPSR_ELn. Saved Program Status Register. 1111001001 */
adr x2, .L__not_in_el3_cpux
msr elr_el3, x2
eret /* Exception Return: from EL3, continue from .L__not_in_el3 */
mov x1, #(1 << 0) /* EL0 and EL1 are in Non-Secure state */
orr x1, x1, #(1 << 4) /* RES1 */
orr x1, x1, #(1 << 5) /* RES1 */
orr x1, x1, #(1 << 10) /* The next lower level is AArch64 */
msr scr_el3, x1
.L__not_in_el3_cpux: /* running at EL2 or EL1 */
cmp x0, #4 /* 0x04 0100 EL1 */
beq .L__in_el1_cpux /* EL1 -> 5: */
mov x1, #9 /* Next level is 0b1001->EL2h */
orr x1, x1, #(1 << 6) /* Mask FIQ */
orr x1, x1, #(1 << 7) /* Mask IRQ */
orr x1, x1, #(1 << 8) /* Mask SError */
orr x1, x1, #(1 << 9) /* Mask Debug Exception */
msr spsr_el3, x1
mrs x0, hcr_el2
bic x0, x0, #0xff
msr hcr_el2, x0
get_phy x1, .init_cpu_hyp
msr elr_el3, x1
eret
msr sp_el1, x1 /* in EL2, set sp of EL1 to _start */
.init_cpu_hyp:
cmp x0, #2 /* EL1 = 0100 */
bne .init_cpu_sys
/* enable CNTP for EL1 */
/* Enable CNTP for EL1 */
mrs x0, cnthctl_el2 /* Counter-timer Hypervisor Control register */
orr x0, x0, #3
orr x0, x0, #(1 << 0) /* Don't traps NS EL0/1 accesses to the physical counter */
orr x0, x0, #(1 << 1) /* Don't traps NS EL0/1 accesses to the physical timer */
msr cnthctl_el2, x0
msr cntvoff_el2, xzr
/* enable AArch64 in EL1 */
mov x0, #(1 << 31) /* AArch64 */
orr x0, x0, #(1 << 1) /* SWIO hardwired on Pi3 */
mov x0, #(1 << 31) /* Enable AArch64 in EL1 */
orr x0, x0, #(1 << 1) /* SWIO hardwired */
msr hcr_el2, x0
mrs x0, hcr_el2
/* change execution level to EL1 */
mov x2, #0x3c4
msr spsr_el2, x2 /* 1111000100 */
adr x2, .L__in_el1_cpux
msr elr_el2, x2
mov x0, #5 /* Next level is 0b0101->EL1h */
orr x0, x0, #(1 << 6) /* Mask FIQ */
orr x0, x0, #(1 << 7) /* Mask IRQ */
orr x0, x0, #(1 << 8) /* Mask SError */
orr x0, x0, #(1 << 9) /* Mask Debug Exception */
msr spsr_el2, x0
eret /* exception return. from EL2. continue from .L__in_el1 */
get_phy x0, .init_cpu_sys
msr elr_el2, x0
eret
.L__in_el1_cpux:
mrs x0, tpidr_el1
/* each cpu init stack is 8k */
sub x1, x1, x0, lsl #13
mov sp, x1 /* in EL1. Set sp to _start */
.init_cpu_sys:
mrs x0, sctlr_el1
orr x0, x0, #(1 << 12) /* Enable Instruction */
bic x0, x0, #(3 << 3) /* Disable SP Alignment check */
bic x0, x0, #(1 << 1) /* Disable Alignment check */
msr sctlr_el1, x0
/* Set CPACR_EL1 (Architecture Feature Access Control Register) to avoid trap from SIMD or float point instruction */
mov x1, #0x00300000 /* Don't trap any SIMD/FP instructions in both EL0 and EL1 */
msr cpacr_el1, x1
/* Avoid trap from SIMD or float point instruction */
mov x0, #0x00300000 /* Don't trap any SIMD/FP instructions in both EL0 and EL1 */
msr cpacr_el1, x0
.L__jump_to_entry_cpux: /* jump to C code, should not return */
/* Applying context change */
dsb ish
isb
/* init mmu early */
ret
bl mmu_tcr_init
init_kernel_bss:
get_phy x1, __bss_start
get_phy x2, __bss_end
sub x2, x2, x1 /* Get bss size */
bl get_ttbrn_base
add x1, x0, #0x1000
and x3, x2, #7 /* x3 is < 7 */
ldr x4, =~0x7
and x2, x2, x4 /* Mask ~7 */
.clean_bss_loop_quad:
cbz x2, .clean_bss_loop_byte
str xzr, [x1], #8
sub x2, x2, #8
b .clean_bss_loop_quad
.clean_bss_loop_byte:
cbz x3, .clean_bss_end
strb wzr, [x1], #1
sub x3, x3, #1
b .clean_bss_loop_byte
.clean_bss_end:
ret
init_cpu_stack_early:
msr spsel, #1
mov sp, stack_top
ret
init_mmu_early:
get_phy x0, .early_page_array
bl set_free_page
get_phy x0, .early_tbl0_page
get_phy x1, .early_tbl1_page
get_pvoff x2 x3
ldr x2, =0x40000000 /* Map 1G memory for kernel space */
bl rt_hw_mem_setup_early
b enable_mmu_early
enable_mmu_early:
get_phy x0, .early_tbl0_page
get_phy x1, .early_tbl1_page
msr ttbr0_el1, x0
msr ttbr1_el1, x1
dsb sy
ldr x30, =after_mmu_enable_cpux /* set LR to after_mmu_enable function, it's a v_addr */
bl mmu_tcr_init
/*
* OK, now, we don't use sp before jump to kernel, set sp to current cpu's
* stack top to visual address
*/
get_pvoff x1 x0
mov x1, stack_top
sub x1, x1, x0
mov sp, x1
ldr x30, =kernel_start /* Set LR to kernel_start function, it's virtual addresses */
mrs x1, sctlr_el1
bic x1, x1, #(3 << 3) /* dis SA, SA0 */
bic x1, x1, #(1 << 1) /* dis A */
orr x1, x1, #(1 << 12) /* I */
orr x1, x1, #(1 << 2) /* C */
orr x1, x1, #(1 << 0) /* M */
msr sctlr_el1, x1 /* enable MMU */
orr x1, x1, #(1 << 2) /* Cacheable Normal memory in stage1 */
orr x1, x1, #(1 << 0) /* MMU Enable */
msr sctlr_el1, x1
dsb ish
isb
dsb sy
isb sy
ic ialluis /* Invalidate all instruction caches in Inner Shareable domain to Point of Unification */
dsb sy
isb sy
dsb ish
isb
tlbi vmalle1 /* Invalidate all stage 1 translations used at EL1 with the current VMID */
dsb sy
isb sy
dsb ish
isb
ret
after_mmu_enable_cpux:
#ifdef RT_USING_SMART
mrs x0, tcr_el1 /* disable ttbr0, only using kernel space */
orr x0, x0, #(1 << 7)
msr tcr_el1, x0
msr ttbr0_el1, xzr
dsb sy
/*
* CPU stack builtin
*/
.section ".bss.noclean.cpus_stack"
.align 12
.cpus_stack:
#if defined(RT_USING_SMP) && RT_CPUS_NR > 1
.space (ARCH_SECONDARY_CPU_STACK_SIZE * (RT_CPUS_NR - 1))
.secondary_cpu_stack_top:
#endif
.space ARCH_SECONDARY_CPU_STACK_SIZE
.boot_cpu_stack_top:
mov x0, #1
msr spsel, x0
mrs x0, tpidr_el1
/* each cpu init stack is 8k */
adr x1, .el_stack_top
sub x1, x1, x0, lsl #13
mov sp, x1 /* in EL1. Set sp to _start */
b rt_hw_secondary_cpu_bsp_start
#endif
#ifndef RT_CPUS_NR
#define RT_CPUS_NR 1
#endif
.align 12
.el_stack:
.space (8192 * RT_CPUS_NR)
.el_stack_top:
/*
* Early page builtin
*/
.section ".bss.noclean.early_page"
.align 12
.early_tbl0_page:
.space ARCH_PAGE_SIZE
.early_tbl1_page:
/* Map 4G -> 2M * 512 entries */
.space 4 * ARCH_PAGE_SIZE
.early_page_array:
.space 24 * ARCH_PAGE_SIZE