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[kernel] Save all cpu_data pointers in global array

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For the sake of introspection and debugging, I created a new g_cpu_data
pointer, which points to an array of cpu_data pointers.
This commit is contained in:
Justin C. Miller
2022-03-13 17:40:19 -07:00
parent 95252e793c
commit 1cc22e78e2
2 changed files with 7 additions and 1 deletions
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2
src/kernel/cpu.cpp
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@@ -22,6 +22,7 @@ panic_data g_panic_data;
panic_data *g_panic_data_p = &g_panic_data;
cpu_data g_bsp_cpu_data;
cpu_data **g_cpu_data = nullptr;
// Validate the required CPU features are present. Really, the bootloader already
@@ -115,6 +116,7 @@ cpu_create(uint16_t id, uint16_t index)
GDT *gdt = new GDT {tss};
cpu_data *cpu = new cpu_data;
memset(cpu, 0, sizeof(cpu_data));
g_cpu_data[index] = cpu;
cpu->self = cpu;
cpu->id = id;

6
src/kernel/smp.cpp
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@@ -22,6 +22,8 @@ extern size_t ap_startup_code_size;
extern obj::process &g_kernel_process;
extern obj::vm_area_guarded &g_kernel_stacks;
extern cpu_data **g_cpu_data;
namespace smp {
volatile size_t ap_startup_count;
@@ -35,13 +37,15 @@ start(cpu_data &bsp, void *kpml4)
using mem::kernel_stack_pages;
using obj::vm_flags;
ap_startup_count = 1; // Count the BSP
clock &clk = clock::get();
const auto &ids = device_manager::get().get_apic_ids();
g_cpu_data = new cpu_data* [ids.count()];
g_cpu_data[bsp.index] = &bsp;
log::info(logs::boot, "Starting %d other CPUs", ids.count() - 1);
// Since we're using address space outside kernel space, make sure