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Added free page count to panic()

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Tom-on
2026-03-27 15:05:47 +01:00
parent f316916ff1
commit ad45de562a
4 changed files with 40 additions and 6 deletions
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kernel/src/pmm.c
+8 -4
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@@ -7,7 +7,8 @@
#include <pmm.h>
uint64_t* pmm_head = NULL;
size_t pmm_total_mem = 0;
size_t pmm_total_pages = 0;
size_t pmm_free_pages = 0;
int pmm_init(void) {
pr_info("[pmm] Physical memory map:\n"); // We're gonna use the loop to also print the memmap
@@ -33,12 +34,13 @@ int pmm_init(void) {
uint64_t* addr = TO_VIRT(entry->base) + offset;
*addr = (uint64_t)pmm_head;
pmm_head = addr;
pmm_total_mem += PAGE_SIZE;
pmm_total_pages++;
}
}
pr_info("[pmm] %d bytes of available memory.\n", pmm_total_mem);
if (pmm_total_mem == 0) return -ENOMEM;
pr_info("[pmm] %d free pages.\n", pmm_total_pages);
if (pmm_total_pages == 0) return -ENOMEM;
pmm_free_pages = pmm_total_pages;
return SUCCESS;
}
@@ -49,6 +51,7 @@ void* pmm_alloc() {
uint64_t* addr = pmm_head;
if ((uintptr_t)addr % PAGE_SIZE != 0) panic("pmm_head corrupted.");
pmm_head = (uint64_t*)(*addr);
pmm_free_pages--;
return TO_PHYS(addr);
}
@@ -60,6 +63,7 @@ int pmm_free(void* page) {
uint64_t* addr = TO_VIRT(page);
*addr = (uint64_t)pmm_head;
pmm_head = addr;
pmm_free_pages++;
return SUCCESS;
}