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[boot] Load programs in boot, not kernel

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Remove ELF and initrd loading from the kernel. The bootloader now loads
the initial programs, as it does with the kernel. Other files that were
in the initrd are now on the ESP, and non-program files are just passed
as modules.
This commit is contained in:
Justin C. Miller
2020-10-04 17:11:03 -07:00
parent da38006f44
commit 4ccaa2dfea
19 changed files with 282 additions and 351 deletions
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65
src/kernel/main.cpp
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@@ -3,7 +3,6 @@
#include "j6/signals.h"
#include "initrd/initrd.h"
#include "kutil/assert.h"
#include "apic.h"
#include "block_device.h"
@@ -117,56 +116,31 @@ kernel_main(args::header *header)
cpu_id cpu;
cpu.validate();
/*
if (header->frame_buffer && header->frame_buffer_length) {
page_manager::get()->map_offset_pointer(
&header->frame_buffer,
header->frame_buffer_length);
for (size_t i = 0; i < header->num_modules; ++i) {
args::module &mod = header->modules[i];
switch (mod.type) {
case args::mod_type::symbol_table:
new symbol_table {mod.location, mod.size};
break;
default:
break;
}
}
*/
log::debug(logs::boot, " jsix header is at: %016lx", header);
log::debug(logs::boot, " Memory map is at: %016lx", header->mem_map);
log::debug(logs::boot, "ACPI root table is at: %016lx", header->acpi_table);
log::debug(logs::boot, "Runtime service is at: %016lx", header->runtime_services);
// Load the module tagged as initrd
kutil::vector<initrd::disk> initrds;
for (unsigned i = 0; i < header->num_modules; ++i) {
args::module &mod = header->modules[i];
if (mod.type != args::mod_type::initrd)
continue;
initrd::disk &ird = initrds.emplace(mod.location);
log::info(logs::boot, "initrd loaded with %d files.", ird.files().count());
for (auto &f : ird.files()) {
char type = f.executable() ? '*' :
f.symbols() ? '+' : ' ';
log::info(logs::boot, " %c%s (%d bytes).", type, f.name(), f.size());
}
}
/*
page_manager::get()->dump_pml4(nullptr, 0);
page_manager::get()->dump_blocks(true);
*/
device_manager &devices = device_manager::get();
devices.parse_acpi(header->acpi_table);
interrupts_enable();
/*
auto r = cpu.get(0x15);
log::info(logs::boot, "CPU Crystal: %dHz", r.ecx);
uintptr_t cr4 = 0;
__asm__ __volatile__ ( "mov %%cr4, %0" : "=r" (cr4) );
log::info(logs::boot, "cr4: %016x", cr4);
*/
devices.init_drivers();
devices.get_lapic()->calibrate_timer();
/*
block_device *disk = devices->get_block_device(0);
if (disk) {
@@ -191,22 +165,15 @@ kernel_main(args::header *header)
}
*/
devices.get_lapic()->calibrate_timer();
devices.init_drivers();
syscall_enable();
scheduler *sched = new scheduler(devices.get_lapic());
std_out = new channel;
for (auto &ird : initrds) {
for (auto &f : ird.files()) {
if (f.executable()) {
sched->load_process(f.name(), f.data(), f.size());
} else if (f.symbols()) {
new symbol_table {f.data(), f.size()};
}
}
// Skip program 0, which is the kernel itself
for (size_t i = 1; i < header->num_programs; ++i) {
args::program &prog = header->programs[i];
sched->load_process(prog.phys_addr, prog.virt_addr, prog.size, prog.entrypoint);
}
sched->create_kernel_task(logger_task, scheduler::max_priority-1, true);