From cbe2690cd5d1b290633c466ebb4df7b64b09b037 Mon Sep 17 00:00:00 2001 From: Danny Holman Date: Thu, 28 Mar 2024 21:30:12 -0500 Subject: arch: i386: kernel: add mostly finished PFA and paging system Add the mostly finished physical memory allocator and expose its functions to the paging system. Signed-off-by: Danny Holman --- arch/i386/include/kernel/pmem.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 arch/i386/include/kernel/pmem.h (limited to 'arch/i386/include/kernel/pmem.h') diff --git a/arch/i386/include/kernel/pmem.h b/arch/i386/include/kernel/pmem.h new file mode 100644 index 0000000..ddd9c8b --- /dev/null +++ b/arch/i386/include/kernel/pmem.h @@ -0,0 +1,28 @@ +#ifndef I386_PMEM_H +#define I386_PMEM_H + +#include +#include + +#define PFA_BLOCK_FREE 1 +#define PFA_BLOCK_ALLOC 3 + +#define PFA_ALLOC_ERR 0xFFFFFFFF + +struct pfa_page { + struct pfa_page *next; +}; + +struct pfa_zone { + uintptr_t start; + uintptr_t size; + struct pfa_page *freelist; +}; + +int pfa_init(struct mboot_info *header); + +uintptr_t pfa_alloc(void); +void pfa_free(struct pfa_zone *zone, uintptr_t paddr); +void pfa_free_range(struct pfa_zone *zone, uintptr_t pstart, uintptr_t pend); + +#endif -- cgit v1.2.3