From e0b34937b1bd674c05d609331501f81740fbb87f Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Thu, 23 May 2024 01:31:02 -0400
Subject: kernel: vm: Add memory stats

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/include/vm/physseg.h | 7 +++++++
 sys/include/vm/vm.h      | 6 ++++++
 2 files changed, 13 insertions(+)

(limited to 'sys/include/vm')

diff --git a/sys/include/vm/physseg.h b/sys/include/vm/physseg.h
index aced4cb..af8cae8 100644
--- a/sys/include/vm/physseg.h
+++ b/sys/include/vm/physseg.h
@@ -32,8 +32,15 @@
 
 #include <sys/types.h>
 
+struct physmem_stat {
+    size_t reserved_kib;     /* Reserved memory */
+    size_t total_kib;        /* Total memory */
+};
+
 void vm_physseg_init(void);
 uintptr_t vm_alloc_pageframe(size_t count);
+
 void vm_free_pageframe(uintptr_t base, size_t count);
+struct physmem_stat vm_phys_memstat(void);
 
 #endif      /* !_VM_VM_PHYSSEG_H_ */
diff --git a/sys/include/vm/vm.h b/sys/include/vm/vm.h
index 975eff0..f6fba66 100644
--- a/sys/include/vm/vm.h
+++ b/sys/include/vm/vm.h
@@ -39,6 +39,7 @@
 #include <sys/cdefs.h>
 #include <vm/page.h>
 #include <vm/pmap.h>
+#include <vm/physseg.h>
 
 extern volatile struct limine_hhdm_request g_hhdm_request;
 
@@ -52,6 +53,10 @@ struct vm_range {
     uintptr_t end;
 };
 
+struct vm_memstat {
+    struct physmem_stat pmem_stat;
+};
+
 /*
  * Returns the machine's pagesize:
  *
@@ -67,5 +72,6 @@ vm_get_page_size(void)
 void vm_init(void);
 struct vm_ctx *vm_get_ctx(void);
 struct vas vm_get_kvas(void);
+struct vm_memstat vm_memstat(void);
 
 #endif      /* !_VM_H_ */
-- 
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