From 32dbfb1ae399904c9fadc5b7fff232fcbc139add Mon Sep 17 00:00:00 2001 From: sigsegv7 Date: Sat, 7 Oct 2023 16:52:15 -0400 Subject: kernel: vm: Add pageframe allocation This commit introduces pageframe allocation logic to the Vega virtual memory subsystem. Signed-off-by: sigsegv7 --- sys/include/vm/vm.h | 15 +++++++++++++++ sys/include/vm/vm_physseg.h | 4 ++++ 2 files changed, 19 insertions(+) (limited to 'sys/include') diff --git a/sys/include/vm/vm.h b/sys/include/vm/vm.h index 78038f0..baf7677 100644 --- a/sys/include/vm/vm.h +++ b/sys/include/vm/vm.h @@ -32,6 +32,8 @@ #include #include +#include +#include extern volatile struct limine_hhdm_request g_hhdm_request; @@ -40,6 +42,19 @@ extern volatile struct limine_hhdm_request g_hhdm_request; #define PHYS_TO_VIRT(phys) (void *)((uintptr_t)phys + VM_HIGHER_HALF) #define VIRT_TO_PHYS(virt) ((uintptr_t)virt - VM_HIGHER_HALF) +/* + * Returns the machine's pagesize: + * + * XXX TODO: This needs to be moved to vmm_init.c + * while returning a non-constant value. + */ +static inline size_t +vm_get_page_size(void) +{ + return 4096; +} + void vm_init(void); +struct vas vm_new_vas(void); #endif /* !_VM_H_ */ diff --git a/sys/include/vm/vm_physseg.h b/sys/include/vm/vm_physseg.h index 5bf21db..5865a84 100644 --- a/sys/include/vm/vm_physseg.h +++ b/sys/include/vm/vm_physseg.h @@ -30,6 +30,10 @@ #ifndef _VM_VM_PHYSSEG_H_ #define _VM_VM_PHYSSEG_H_ +#include + void vm_physseg_init(void); +uintptr_t vm_alloc_pageframe(size_t count); +void vm_free_pageframe(uintptr_t base, size_t count); #endif /* !_VM_VM_PHYSSEG_H_ */ -- cgit v1.2.3