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Kernel: Per processor information is now stored in class Processor

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This allows us to allocate processor stacks, and other per processor
structures dynamically in runtime. Giving processor stack to
ap_trampoline feels super hacky, but it works for now.
This commit is contained in:
Bananymous
2024-03-03 22:30:06 +02:00
parent c035d3c82c
commit 8141b9977d
11 changed files with 171 additions and 83 deletions
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17
kernel/kernel/APIC.cpp
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@@ -26,6 +26,7 @@ extern uint8_t g_ap_init_addr[];
extern volatile uint8_t g_ap_startup_done[];
extern volatile uint8_t g_ap_running_count[];
extern volatile uint8_t g_ap_stack_loaded[];
namespace Kernel
{
@@ -215,7 +216,7 @@ namespace Kernel
dprintln("System has {} processors", m_processors.size());
uint8_t bsp_id = get_processor_id();
uint8_t bsp_id = Kernel::Processor::current_id();
dprintln("BSP lapic id: {}", bsp_id);
for (auto& processor : m_processors)
@@ -231,6 +232,13 @@ namespace Kernel
dprintln("Trying to enable processor (lapic id {})", processor.apic_id);
Kernel::Processor::create(processor.processor_id);
PageTable::with_fast_page((paddr_t)g_ap_init_addr, [&] {
PageTable::fast_page_as_sized<uint32_t>(2) = V2P(Kernel::Processor::get(processor.processor_id).stack_top());
});
*g_ap_stack_loaded = 0;
write_to_local_apic(LAPIC_ERROR_REG, 0x00);
send_ipi(processor.processor_id, (read_from_local_apic(LAPIC_ICR_LO_REG) & 0xFFF00000) | 0x0000C500, 0);
send_ipi(processor.processor_id, (read_from_local_apic(LAPIC_ICR_LO_REG) & 0xFFF0F800) | 0x00008500, 0);
@@ -242,12 +250,13 @@ namespace Kernel
write_to_local_apic(LAPIC_ERROR_REG, 0x00);
send_ipi(processor.processor_id, (read_from_local_apic(LAPIC_ICR_LO_REG) & 0xFFF0F800) | 0x00000600 | ap_init_page, 200);
}
// give processor upto 100 * 100 us (10 ms to boot)
for (int i = 0; *g_ap_stack_loaded == 0 && i < 100; i++)
udelay(100);
}
*g_ap_startup_done = 1;
udelay(100);
dprintln("{} processors started", *g_ap_running_count);
}