From 7237d673904d8568a2f9c290a0247c9d1a07c5d2 Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Mon, 11 Oct 2021 23:18:47 +0300
Subject: Start designing vmem framework

---
 arch/riscv/common/vmem.c | 30 ++++++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

(limited to 'arch/riscv/common/vmem.c')

diff --git a/arch/riscv/common/vmem.c b/arch/riscv/common/vmem.c
index ef89ec3..207df34 100644
--- a/arch/riscv/common/vmem.c
+++ b/arch/riscv/common/vmem.c
@@ -1,7 +1,7 @@
 #include <apos/string.h>
 #include <apos/pmem.h>
+#include <apos/vmem.h>
 #include <pages.h>
-#include <vmem.h>
 
 #define pte_ppn(pte) (((pm_t)(pte)) >> 10)
 #define pte_flags(pte) (((pm_t)(pte)) & 0xff)
@@ -13,7 +13,7 @@ void map_vmem(struct vm_branch_t *branch,
 		pm_t paddr, vm_t vaddr,
 		uint8_t flags, enum mm_order_t order)
 {
-	enum mm_order_t top = MAX_ORDER;
+	enum mm_order_t top = __mm_max_order;
 	while(top != order){
 		size_t idx = pm_to_index(vaddr, top);
 
@@ -45,3 +45,29 @@ void unmap_vmem(struct vm_branch_t *branch,
 
 	branch->leaf[idx] = 0;
 }
+
+vm_t map_vregion(struct vm_branch_t *branch, pm_t base, pm_t top, vm_t start, vm_t end)
+{
+	/* TODO: figure out how to find first suitable memory region */
+
+	/* find first free page, iterate forward until we either fit the whole
+	 * physical region or hit a used page
+	 *
+	 * continue until we hit end?
+	 */
+}
+
+void unmap_vregion(struct vm_branch_t *branch, pm_t base, pm_t top)
+{
+	/* TODO */
+}
+
+vm_t map_vsize(struct vm_branch_t *branch, size_t size)
+{
+	/* TODO */
+}
+
+void unmap_vsize(struct vm_branch_t *branch, size_t size)
+{
+	/* TODO */
+}
-- 
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