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aos/kernel/arch/armv8/startup_arch.c
Daniel Schwyn 6d444bf552 Main handout 
Signed-off-by: Daniel Schwyn <daniel.schwyn@inf.ethz.ch>
2022-03-03 14:57:51 +01:00

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/*
* Copyright (c) 2009,2010,2015, ETH Zurich.
* Copyright (c) 2015, Hewlett Packard Enterprise Development LP.
* All rights reserved.
*
* This file is distributed under the terms in the attached LICENSE file.
* If you do not find this file, copies can be found by writing to:
* ETH Zurich D-INFK, Universitaetstrasse 6, CH-8092 Zurich. Attn: Systems Group.
*/
#include <kernel.h>
#include <dispatch.h>
#include <string.h>
#include <stdio.h>
#include <barrelfish_kpi/init.h>
#include <barrelfish_kpi/syscalls.h>
#include <elf/elf.h>
#include <arm_hal.h>
#include <paging_kernel_arch.h>
#include <exceptions.h>
#include <sysreg.h>
#include <cpiobin.h>
#include <init.h>
#include <barrelfish_kpi/arm_core_data.h>
#include <kernel_multiboot2.h>
#include <offsets.h>
#include <startup_arch.h>
#include <systime.h>
#include <arch/arm/platform.h>
#include <barrelfish_kpi/startup_arm.h>
#include <target/aarch64/barrelfish_kpi/paging_arm_v8.h>
#include <global.h>
#include <kcb.h>
#include <efi.h>
#define CNODE(cte) get_address(&(cte)->cap)
#define STARTUP_PROGRESS() debug(SUBSYS_STARTUP, "%s:%d\n", \
__FUNCTION__, __LINE__);
#define MSG(format, ...) printk( LOG_NOTE, "ARMv8-A: "format, ## __VA_ARGS__ )
#if !defined(BF_BINARY_PREFIX)
# define BF_BINARY_PREFIX
#endif
#define BSP_INIT_MODULE_NAME BF_BINARY_PREFIX "armv8/sbin/init"
#define APP_INIT_MODULE_NAME BF_BINARY_PREFIX "armv8/sbin/init"
//static phys_mmap_t* g_phys_mmap; // Physical memory map
static union armv8_ttable_entry *init_l0; // L0 page table for init
static union armv8_ttable_entry *init_l1; // L1 page table for init
static union armv8_ttable_entry *init_l2; // L2 page tables for init
static union armv8_ttable_entry *init_l3; // L3 page tables for init
static struct spawn_state spawn_state;
/// Pointer to bootinfo structure for init
struct bootinfo* bootinfo = NULL;
/**
* Each kernel has a local copy of global and locks. However, during booting and
* kernel relocation, these are set to point to global of the pristine kernel,
* so that all the kernels can share it.
*/
//static struct global myglobal;
struct global *global;
static inline uintptr_t round_up(uintptr_t value, size_t unit)
{
assert(0 == (unit & (unit - 1)));
size_t m = unit - 1;
return (value + m) & ~m;
}
static inline uintptr_t round_down(uintptr_t value, size_t unit)
{
assert(0 == (unit & (unit - 1)));
size_t m = unit - 1;
return value & ~m;
}
/**
* Map frames into init process address space. Init has a contiguous set of
* l3 entries so this is straightforward.
*
* @param l3_table pointer to init's L3 table.
* @param l3_base virtual address represented by first L3 table entry
* @param va_base virtual address to map.
* @param pa_base physical address to associate with virtual address.
* @param bytes number of bytes to map.
* @param l3_flags ARM L3 small page flags for mapped pages.
*/
static void spawn_init_map(union armv8_ttable_entry *l3_table, lvaddr_t l3_base,
lvaddr_t va_base, lpaddr_t pa_base, size_t bytes,
uintptr_t l3_flags)
{
assert(va_base >= l3_base);
assert(0 == (va_base & (BASE_PAGE_SIZE - 1)));
assert(0 == (pa_base & (BASE_PAGE_SIZE - 1)));
assert(0 == (bytes & (BASE_PAGE_SIZE - 1)));
long bi = (va_base - l3_base) / BASE_PAGE_SIZE;
long li = bi + bytes / BASE_PAGE_SIZE;
while (bi < li) {
/* XXX: we should check not to overrun here */
paging_set_l3_entry(&l3_table[bi], pa_base, l3_flags);
pa_base += BASE_PAGE_SIZE;
bi++;
}
}
static uint32_t elf_to_l3_flags(uint32_t eflags)
{
switch (eflags & (PF_W|PF_R))
{
case PF_W|PF_R:
return (VMSAv8_64_L3_USR_RW |
VMSAv8_64_L3_CACHEABLE |
VMSAv8_64_L3_BUFFERABLE);
case PF_R:
return (VMSAv8_64_L3_USR_RO |
VMSAv8_64_L3_CACHEABLE |
VMSAv8_64_L3_BUFFERABLE);
default:
panic("Unknown ELF flags combination.");
}
}
struct startup_l3_info
{
union armv8_ttable_entry *l3_table;
lvaddr_t l3_base;
};
static errval_t startup_alloc_init(void* state, genvaddr_t gvbase, size_t bytes,
uint32_t flags, void **ret)
{
const struct startup_l3_info* s2i = (const struct startup_l3_info*)state;
lvaddr_t sv = round_down((lvaddr_t)gvbase, BASE_PAGE_SIZE);
size_t off = (lvaddr_t)gvbase - sv;
lvaddr_t lv = round_up((lvaddr_t)gvbase + bytes, BASE_PAGE_SIZE);
lpaddr_t pa;
//STARTUP_PROGRESS();
if(cpu_is_bsp())
pa = bsp_alloc_phys_aligned((lv - sv), BASE_PAGE_SIZE);
else
pa = app_alloc_phys_aligned((lv - sv), BASE_PAGE_SIZE);
if (lv > sv && (pa != 0))
{
spawn_init_map(s2i->l3_table, s2i->l3_base, sv,
pa, lv - sv, elf_to_l3_flags(flags));
*ret = (void*)(local_phys_to_mem(pa) + off);
}
else
{
*ret = 0;
}
return SYS_ERR_OK;
}
static void
load_init_image(
struct startup_l3_info* l3i,
const char *name,
genvaddr_t* init_ep,
genvaddr_t* got_base
)
{
lvaddr_t elf_base;
size_t elf_bytes;
errval_t err;
*init_ep = *got_base = 0;
/* Load init ELF64 binary */
struct multiboot_info *multiboot =
(struct multiboot_info *) local_phys_to_mem(
armv8_glbl_core_data->multiboot_image.base);
struct multiboot_tag_module_64 *module = multiboot2_find_module_64(
multiboot->tags, multiboot->total_size - 8, name);
if (module == NULL) {
panic("Could not find init module!");
}
elf_base = local_phys_to_mem(module->mod_start);
elf_bytes = MULTIBOOT_MODULE_SIZE(*module);
debug(SUBSYS_STARTUP, "load_init_image %p %08x\n", elf_base, elf_bytes);
printf("load_init_image %p %08x\n", elf_base, elf_bytes);
err = elf_load(EM_AARCH64, startup_alloc_init, l3i,
elf_base, elf_bytes, init_ep);
if (err_is_fail(err)) {
//err_print_calltrace(err);
panic("ELF load of " BSP_INIT_MODULE_NAME " failed!\n");
}
// TODO: Fix application linkage so that it's non-PIC.
struct Elf64_Shdr* got_shdr =
elf64_find_section_header_name((lvaddr_t)elf_base, elf_bytes, ".got");
if (got_shdr)
{
*got_base = got_shdr->sh_addr;
}
}
/// Setup the module cnode, which contains frame caps to all multiboot modules
void create_module_caps(struct spawn_state *st)
{
errval_t err;
/* Create caps for multiboot modules */
struct multiboot_info *multiboot =
(struct multiboot_info *)local_phys_to_mem(armv8_glbl_core_data->multiboot_image.base);
// Allocate strings area
lpaddr_t mmstrings_phys = bsp_alloc_phys(BASE_PAGE_SIZE);
lvaddr_t mmstrings_base = local_phys_to_mem(mmstrings_phys);
lvaddr_t mmstrings = mmstrings_base;
// create cap for strings area in first slot of modulecn
assert(st->modulecn_slot == 0);
err = caps_create_new(ObjType_Frame, mmstrings_phys, BASE_PAGE_SIZE,
BASE_PAGE_SIZE, my_core_id,
caps_locate_slot(CNODE(st->modulecn),
st->modulecn_slot++));
assert(err_is_ok(err));
//Nag
bootinfo->regions_length = 0;
/* Walk over multiboot modules, creating frame caps */
size_t position = 0;
struct mem_region *region;
lpaddr_t acpi_base = (lpaddr_t)-1;
/* add the ACPI regions */
struct multiboot_tag_new_acpi *acpi_new;
acpi_new = (struct multiboot_tag_new_acpi *)
multiboot2_find_tag(multiboot->tags, multiboot->total_size - 8, MULTIBOOT_TAG_TYPE_ACPI_NEW);
if (acpi_new) {
acpi_base = mem_to_local_phys((lvaddr_t)&acpi_new->rsdp[0]);
} else {
struct multiboot_tag_old_acpi *acpi_old;
acpi_old = (struct multiboot_tag_old_acpi *)
multiboot2_find_tag(multiboot->tags, multiboot->total_size - 8, MULTIBOOT_TAG_TYPE_ACPI_OLD);
if (acpi_old) {
acpi_base = mem_to_local_phys((lvaddr_t)&acpi_old->rsdp[0]);
}
}
if (acpi_base != (lpaddr_t)-1) {
region = &bootinfo->regions[bootinfo->regions_length++];
region->mr_base = acpi_base;
region->mr_type = RegionType_ACPI_TABLE;
}
/* add the module regions */
position = 0;
struct multiboot_tag_module_64 *module = (struct multiboot_tag_module_64 *)
multiboot2_find_tag(multiboot->tags, multiboot->total_size - 8, MULTIBOOT_TAG_TYPE_MODULE_64);
while (module) {
// Set memory regions within bootinfo
region = &bootinfo->regions[bootinfo->regions_length++];
genpaddr_t remain = module->mod_end - module->mod_start;
genpaddr_t base_addr = local_phys_to_gen_phys(module->mod_start);
region->mr_type = RegionType_Module;
region->mr_base = base_addr;
region->mrmod_slot = st->modulecn_slot; // first slot containing caps
region->mrmod_size = remain; // size of image _in bytes_
region->mrmod_data = mmstrings - mmstrings_base; // offset of string in area
// round up to page size for caps
remain = ROUND_UP(remain, BASE_PAGE_SIZE);
assert((base_addr & BASE_PAGE_MASK) == 0);
assert((remain & BASE_PAGE_MASK) == 0);
assert(st->modulecn_slot < cnode_get_slots(&st->modulecn->cap));
// create as DevFrame cap to avoid zeroing memory contents
err = caps_create_new(ObjType_DevFrame, base_addr, remain,
remain, my_core_id,
caps_locate_slot(CNODE(st->modulecn),
st->modulecn_slot++));
assert(err_is_ok(err));
// Copy multiboot module string to mmstrings area
strcpy((char *)mmstrings, module->cmdline);
mmstrings += strlen(module->cmdline) + 1;
assert(mmstrings < mmstrings_base + BASE_PAGE_SIZE);
module = ((void *) module) + module->size;
position += module->size;
module = (struct multiboot_tag_module_64 *) multiboot2_find_tag(
(struct multiboot_tag *)module, (multiboot->total_size - 8) - position,
MULTIBOOT_TAG_TYPE_MODULE_64);
}
}
static void
create_phys_caps_region(lpaddr_t reserved_start, lpaddr_t reserved_end, lpaddr_t region_base,
size_t region_size, enum region_type region_type) {
errval_t err = SYS_ERR_OK;
if (reserved_start <= region_base + region_size && region_base <= reserved_end) {
// reserved overlaps with region
if (region_base < reserved_start) {
err = create_caps_to_cnode(region_base, reserved_start - region_base, region_type, &spawn_state, bootinfo);
}
assert(err_is_ok(err));
if (region_base + region_size > reserved_end) {
err = create_caps_to_cnode(reserved_end, region_base + region_size - reserved_end, region_type, &spawn_state, bootinfo);
}
} else {
err = create_caps_to_cnode(region_base, region_size, region_type, &spawn_state, bootinfo);
}
assert(err_is_ok(err));
}
/// Create physical address range or RAM caps to unused physical memory
static void create_phys_caps(lpaddr_t reserved_start, lpaddr_t reserved_end)
{
/* Walk multiboot MMAP structure, and create appropriate caps for memory */
struct multiboot_tag_efi_mmap *mmap = (struct multiboot_tag_efi_mmap *)
local_phys_to_mem(armv8_glbl_core_data->efi_mmap);
lpaddr_t last_end_addr = 0;
for (size_t i = 0; i < (mmap->size - sizeof(struct multiboot_tag_efi_mmap)) / mmap->descr_size; i++) {
efi_memory_descriptor *desc = (efi_memory_descriptor *)(mmap->efi_mmap + mmap->descr_size * i);
enum region_type region_type = RegionType_Max;
switch(desc->Type) {
case EfiConventionalMemory:
region_type = RegionType_Empty;
break;
case EfiPersistentMemory :
region_type = RegionType_Empty;
break;
case EfiACPIReclaimMemory :
region_type = RegionType_PlatformData;
break;
default:
region_type = RegionType_PlatformData;
break;
};
if (last_end_addr < desc->PhysicalStart) {
// create cap for gap in mmap
create_phys_caps_region(reserved_start, reserved_end, last_end_addr, desc->PhysicalStart - last_end_addr, RegionType_PhyAddr);
}
last_end_addr = desc->PhysicalStart + desc->NumberOfPages * BASE_PAGE_SIZE;
create_phys_caps_region(reserved_start, reserved_end, desc->PhysicalStart, desc->NumberOfPages * BASE_PAGE_SIZE, region_type);
}
size_t size = (1UL << 48) - last_end_addr;
create_phys_caps_region(reserved_start, reserved_end, last_end_addr, size, RegionType_PhyAddr);
}
static void init_page_tables(void)
{
lpaddr_t (*alloc_phys_aligned)(size_t size, size_t align);
if (cpu_is_bsp()) {
alloc_phys_aligned = bsp_alloc_phys_aligned;
} else {
alloc_phys_aligned = app_alloc_phys_aligned;
}
// Create page table for init
const size_t l0_size = VMSAv8_64_PTABLE_NUM_ENTRIES * INIT_L0_SIZE * sizeof(union armv8_ttable_entry);
init_l0 = (void *) local_phys_to_mem(alloc_phys_aligned(l0_size, VMSAv8_64_PTABLE_SIZE));
memset(init_l0, 0, l0_size);
const size_t l1_size = l0_size * INIT_L1_SIZE;
init_l1 = (void *) local_phys_to_mem(alloc_phys_aligned(l1_size, VMSAv8_64_PTABLE_SIZE));
memset(init_l1, 0, l1_size);
const size_t l2_size = l1_size * INIT_L2_SIZE;
init_l2 = (void *) local_phys_to_mem(alloc_phys_aligned(l2_size, VMSAv8_64_PTABLE_SIZE));
memset(init_l2, 0, l2_size);
const size_t l3_size = l2_size * INIT_L3_SIZE;
init_l3 = (void *) local_phys_to_mem(alloc_phys_aligned(l3_size, VMSAv8_64_PTABLE_SIZE));
memset(init_l3, 0, l3_size);
/* Map pagetables into page CN */
int pagecn_pagemap = 0;
/*
* AARCH64 has:
*
* L0 has 1 entry.
* L1 has 1 entry.
* L2 Coarse has 16 entries (512 * 8B = 4KB).
* L3 Coarse has 16*512 entries (512 * 8B = 4KB).
*
*/
printk(LOG_NOTE, "init page tables: l0=%p, l1=%p, l2=%p, l3=%p\n",
init_l0, init_l1, init_l2, init_l3);
caps_create_new(
ObjType_VNode_AARCH64_l0,
mem_to_local_phys((lvaddr_t)init_l0),
vnode_objsize(ObjType_VNode_AARCH64_l0), 0,
my_core_id,
caps_locate_slot(CNODE(spawn_state.pagecn), pagecn_pagemap++)
);
for (size_t i = 0; i < INIT_L1_SIZE; i++) {
size_t objsize_vnode = vnode_objsize(ObjType_VNode_AARCH64_l1);
assert(objsize_vnode == BASE_PAGE_SIZE);
caps_create_new(
ObjType_VNode_AARCH64_l1,
mem_to_local_phys((lvaddr_t)init_l1) + (i * objsize_vnode),
objsize_vnode, 0, my_core_id,
caps_locate_slot(CNODE(spawn_state.pagecn), pagecn_pagemap++)
);
}
//STARTUP_PROGRESS();
for(size_t i = 0; i < INIT_L2_SIZE; i++) {
size_t objsize_vnode = vnode_objsize(ObjType_VNode_AARCH64_l2);
assert(objsize_vnode == BASE_PAGE_SIZE);
caps_create_new(
ObjType_VNode_AARCH64_l2,
mem_to_local_phys((lvaddr_t)init_l2) + (i * objsize_vnode),
objsize_vnode, 0, my_core_id,
caps_locate_slot(CNODE(spawn_state.pagecn), pagecn_pagemap++)
);
}
// Map L3 into successive slots in pagecn
for(size_t i = 0; i < INIT_L3_SIZE; i++) {
size_t objsize_vnode = vnode_objsize(ObjType_VNode_AARCH64_l3);
assert(objsize_vnode == BASE_PAGE_SIZE);
caps_create_new(
ObjType_VNode_AARCH64_l3,
mem_to_local_phys((lvaddr_t)init_l3) + (i * objsize_vnode),
objsize_vnode, 0,
my_core_id,
caps_locate_slot(CNODE(spawn_state.pagecn), pagecn_pagemap++)
);
}
/*
* Initialize init page tables - this just wires the L0
* entries through to the corresponding L1 entries.
*/
for(lvaddr_t vaddr = ARMV8_INIT_VBASE;
vaddr < ARMV8_INIT_SPACE_LIMIT;
vaddr += VMSAv8_64_L0_SIZE)
{
uintptr_t section = (vaddr - ARMV8_INIT_VBASE) / VMSAv8_64_L0_SIZE;
uintptr_t l1_off = section * VMSAv8_64_PTABLE_SIZE;
lpaddr_t paddr = mem_to_local_phys((lvaddr_t)init_l1) + l1_off;
paging_map_table_l0(init_l0, vaddr, paddr);
}
/*
* Initialize init page tables - this just wires the L1
* entries through to the corresponding L2 entries.
*/
for(lvaddr_t vaddr = ARMV8_INIT_VBASE;
vaddr < ARMV8_INIT_SPACE_LIMIT;
vaddr += VMSAv8_64_L1_BLOCK_SIZE)
{
uintptr_t section = (vaddr - ARMV8_INIT_VBASE) / VMSAv8_64_L1_BLOCK_SIZE;
uintptr_t l2_off = section * VMSAv8_64_PTABLE_SIZE;
lpaddr_t paddr = mem_to_local_phys((lvaddr_t)init_l2) + l2_off;
paging_map_table_l1(init_l1, vaddr, paddr);
}
/*
* Initialize init page tables - this just wires the L2
* entries through to the corresponding L3 entries.
*/
STATIC_ASSERT(0 == (ARMV8_INIT_VBASE % VMSAv8_64_L2_BLOCK_SIZE), "");
for(lvaddr_t vaddr = ARMV8_INIT_VBASE;
vaddr < ARMV8_INIT_SPACE_LIMIT;
vaddr += VMSAv8_64_L2_BLOCK_SIZE)
{
uintptr_t section = (vaddr - ARMV8_INIT_VBASE) / VMSAv8_64_L2_BLOCK_SIZE;
uintptr_t l3_off = section * VMSAv8_64_PTABLE_SIZE;
lpaddr_t paddr = mem_to_local_phys((lvaddr_t)init_l3) + l3_off;
paging_map_table_l2(init_l2, vaddr, paddr);
}
}
static struct dcb *spawn_init_common(const char *name,
int argc, const char *argv[],
lpaddr_t bootinfo_phys,
alloc_phys_func alloc_phys,
alloc_phys_aligned_func alloc_phys_aligned)
{
struct dispatcher_shared_generic *disp;
struct dispatcher_shared_aarch64 *disp_aarch64;
MSG("spawn_init_common %s\n", name);
lvaddr_t paramaddr;
struct dcb *init_dcb = spawn_module(&spawn_state, name, argc, argv,
bootinfo_phys, INIT_ARGS_VBASE,
alloc_phys, alloc_phys_aligned,
&paramaddr);
/* initialize page tables */
init_page_tables();
init_dcb->vspace = mem_to_local_phys((lvaddr_t)init_l0);
spawn_init_map(init_l3, ARMV8_INIT_VBASE, INIT_ARGS_VBASE,
spawn_state.args_page, ARGS_SIZE, INIT_PERM_RW);
/* Map dispatcher */
spawn_init_map(init_l3, ARMV8_INIT_VBASE, INIT_DISPATCHER_VBASE,
mem_to_local_phys(init_dcb->disp), DISPATCHER_FRAME_SIZE,
INIT_PERM_RW);
disp = get_dispatcher_shared_generic(init_dcb->disp);
disp_aarch64 = get_dispatcher_shared_aarch64(init_dcb->disp);
/* Initialize dispatcher */
disp->disabled = true;
strncpy(disp->name, argv[0], DISP_NAME_LEN);
/* Tell init the vspace addr of its dispatcher. */
disp->udisp = INIT_DISPATCHER_VBASE;
disp->systime_frequency = systime_frequency;
/* TODO: write the contet ID for init */
/* Set the thread ID register to point to the shared structure. */
disp_aarch64->enabled_save_area.named.x0 = paramaddr;
disp_aarch64->enabled_save_area.named.spsr = AARCH64_MODE_USR | CPSR_I_MASK;
sysreg_write_tpidrro_el0((uint64_t)disp->udisp);
return init_dcb;
}
struct dcb *spawn_bsp_init(const char *name)
{
MSG("spawning '%s' on BSP core\n", name);
/* Only the first core can run this code */
assert(cpu_is_bsp());
/* Allocate bootinfo */
lpaddr_t bootinfo_phys = bsp_alloc_phys_aligned(BOOTINFO_SIZE, BASE_PAGE_SIZE);
memset((void *)local_phys_to_mem(bootinfo_phys), 0, BOOTINFO_SIZE);
/* store pointer to bootinfo in kernel virtual memory */
bootinfo = (struct bootinfo *) local_phys_to_mem(bootinfo_phys);
/* Construct cmdline args */
char bootinfochar[16];
snprintf(bootinfochar, sizeof(bootinfochar), "%u", INIT_BOOTINFO_VBASE);
const char *argv[] = { "init", bootinfochar };
int argc = 2;
/* perform common spawning of init domain */
struct dcb *init_dcb = spawn_init_common(name, argc, argv,bootinfo_phys,
bsp_alloc_phys, bsp_alloc_phys_aligned);
/* map boot info into init's VSPACE */
spawn_init_map(init_l3, ARMV8_INIT_VBASE, INIT_BOOTINFO_VBASE, bootinfo_phys,
BOOTINFO_SIZE, INIT_PERM_RW);
/* load the image */
genvaddr_t init_ep, got_base;
struct startup_l3_info l3_info = { init_l3, ARMV8_INIT_VBASE };
load_init_image(&l3_info, BSP_INIT_MODULE_NAME, &init_ep, &got_base);
MSG("init loaded with entry=0x%" PRIxGENVADDR " and GOT=0x%" PRIxGENVADDR "\n",
init_ep, got_base);
struct dispatcher_shared_aarch64 *disp_aarch64 =
get_dispatcher_shared_aarch64(init_dcb->disp);
/* setting GOT pointers */
disp_aarch64->got_base = got_base;
/* XXX - Why does the kernel do this? -DC */
disp_aarch64->enabled_save_area.named.x10 = got_base;
disp_aarch64->disabled_save_area.named.x10 = got_base;
/* setting entry points */
disp_aarch64->disabled_save_area.named.pc = init_ep;
disp_aarch64->disabled_save_area.named.spsr = AARCH64_MODE_USR | CPSR_F_MASK;
/* Create caps for init to use */
create_module_caps(&spawn_state);
lpaddr_t init_alloc_end = bsp_alloc_phys(0);
create_phys_caps(armv8_glbl_core_data->start_kernel_ram, init_alloc_end);
/* Cap for most of the memory mapped devices */
struct cte *iocap = caps_locate_slot(CNODE((&spawn_state)->taskcn), TASKCN_SLOT_DEV);
lpaddr_t start;
size_t size;
platform_get_dev_range(&start, &size);
if (start != 0) {
errval_t err;
err = caps_create_new(ObjType_DevFrame, start, size, size, 0, iocap);
assert(err_is_ok(err));
}
/* Fill bootinfo struct */
bootinfo->mem_spawn_core = KERNEL_IMAGE_SIZE; // Size of kernel
return init_dcb;
}
struct dcb *spawn_app_init(struct armv8_core_data *core_data,
const char *name)
{
errval_t err;
MSG("spawning '%s' on APP core\n", name);
/* Only the app core can run this code */
assert(!cpu_is_bsp());
/* Construct cmdline args */
// Core id of the core that booted this core
char coreidchar[10];
snprintf(coreidchar, sizeof(coreidchar), "%d", core_data->src_core_id);
// IPI channel id of core that booted this core
char chanidchar[30];
snprintf(chanidchar, sizeof(chanidchar), "chanid=%"PRIu32, core_data->chan_id);
// Arch id of the core that booted this core
char archidchar[30];
snprintf(archidchar, sizeof(archidchar), "archid=%d",
core_data->src_arch_id);
const char *argv[5] = { name, coreidchar, chanidchar, archidchar };
int argc = 4;
struct dcb *init_dcb= spawn_init_common(name, argc, argv, 0, app_alloc_phys,
app_alloc_phys_aligned);
MSG("creating monitor URPC frame cap\n");
// Urpc frame cap
struct cte *urpc_frame_cte = caps_locate_slot(CNODE(spawn_state.taskcn),
TASKCN_SLOT_MON_URPC);
// XXX: Create as devframe so the memory is not zeroed out
err = caps_create_new(ObjType_DevFrame,
core_data->urpc_frame.base,
core_data->urpc_frame.length,
core_data->urpc_frame.length,
my_core_id,
urpc_frame_cte);
assert(err_is_ok(err));
urpc_frame_cte->cap.type = ObjType_Frame;
lpaddr_t urpc_ptr = gen_phys_to_local_phys(urpc_frame_cte->cap.u.frame.base);
/* Map urpc frame at MON_URPC_BASE */
MSG("mapping URPC frame cap %" PRIxLPADDR" \n",urpc_ptr );
spawn_init_map(init_l3, ARMV8_INIT_VBASE, MON_URPC_VBASE, urpc_ptr,
MON_URPC_SIZE, INIT_PERM_RW);
struct startup_l3_info l3_info = { init_l3, ARMV8_INIT_VBASE };
// elf load the domain
genvaddr_t entry_point, got_base=0;
MSG("loading elf '%s' @ %" PRIxLPADDR "\n", name,
local_phys_to_mem(core_data->monitor_binary.base));
err = elf_load(EM_AARCH64, startup_alloc_init, &l3_info,
local_phys_to_mem(core_data->monitor_binary.base),
core_data->monitor_binary.length, &entry_point);
if (err_is_fail(err)) {
//err_print_calltrace(err);
panic("ELF load of init module failed!");
}
// TODO: Fix application linkage so that it's non-PIC.
struct Elf64_Shdr* got_shdr;
got_shdr = elf64_find_section_header_name(local_phys_to_mem(core_data->monitor_binary.base),
core_data->monitor_binary.length, ".got");
if (got_shdr)
{
got_base = got_shdr->sh_addr;
}
MSG("init loaded with entry=0x%" PRIxGENVADDR " and GOT=0x%" PRIxGENVADDR "\n",
entry_point, got_base);
struct dispatcher_shared_aarch64 *disp_aarch64 =
get_dispatcher_shared_aarch64(init_dcb->disp);
disp_aarch64->got_base = got_base;
disp_aarch64->enabled_save_area.named.x10 = got_base;
disp_aarch64->disabled_save_area.named.x10 = got_base;
/* setting entry points */
disp_aarch64->disabled_save_area.named.pc = entry_point;
disp_aarch64->disabled_save_area.named.spsr = AARCH64_MODE_USR | CPSR_F_MASK;
//arch_set_thread_register(INIT_DISPATCHER_VBASE);
MSG("init dcb set up\n");
return init_dcb;
}
void arm_kernel_startup(void)
{
/* Initialize the core_data */
/* Used when bringing up other cores, must be at consistent global address
* seen by all cores */
struct dcb *init_dcb;
if (cpu_is_bsp()) {
MSG("Doing BSP related bootup \n");
/* Initialize the location to allocate phys memory from */
printf("start_free_ram = 0x%lx\n", armv8_glbl_core_data->start_free_ram);
bsp_init_alloc_addr = armv8_glbl_core_data->start_free_ram;
/* allocate initial KCB */
kcb_current= (struct kcb *)local_phys_to_mem(
bsp_alloc_phys(sizeof(*kcb_current)));
assert(kcb_current);
memset(kcb_current, 0, sizeof(*kcb_current));
init_dcb = spawn_bsp_init(BSP_INIT_MODULE_NAME);
} else {
MSG("Doing non-BSP related bootup \n");
/* Initialize the allocator */
app_alloc_phys_start = (armv8_glbl_core_data->memory.base);
app_alloc_phys_end = (armv8_glbl_core_data->memory.length + app_alloc_phys_start);
MSG("Memory: %lx, %lx, size=%zu kB\n", app_alloc_phys_start, app_alloc_phys_end,
(app_alloc_phys_end - app_alloc_phys_start + 1) >> 10);
kcb_current= (struct kcb *)local_phys_to_mem(armv8_glbl_core_data->kcb);
init_dcb = spawn_app_init(armv8_glbl_core_data, APP_INIT_MODULE_NAME);
}
// enable interrupt forwarding to cpu
MSG("Calling dispatch from arm_kernel_startup, entry point %#"PRIxLVADDR"\n",
get_dispatcher_shared_aarch64(init_dcb->disp)->disabled_save_area.named.pc);
#ifndef CONFIG_ONESHOT_TIMER
systime_set_timer(kernel_timeslice);
#endif
// Should not return
dispatch(init_dcb);
panic("Error spawning init!");
}
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