From 6f052e236715846b1a14f9fe59f89346efb809e6 Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Thu, 30 Dec 2021 20:48:26 +0200
Subject: Add initial version of device memory mapping

---
 include/apos/dev.h  | 16 ++++++++++++++++
 include/apos/vmem.h | 17 ++++++++++++++++-
 2 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 include/apos/dev.h

(limited to 'include')

diff --git a/include/apos/dev.h b/include/apos/dev.h
new file mode 100644
index 0000000..1e710a1
--- /dev/null
+++ b/include/apos/dev.h
@@ -0,0 +1,16 @@
+#ifndef APOS_DEV_H
+#define APOS_DEV_H
+
+#include <apos/types.h>
+#include <apos/vmem.h>
+
+extern pm_t __pre_base;
+extern pm_t __pre_top;
+extern pm_t __post_base;
+extern pm_t __post_top;
+
+void init_devmem(pm_t ram_base, pm_t ram_top);
+vm_t alloc_devmem(struct tcb *t, pm_t dev_start, size_t bytes, uint8_t flags);
+void free_devmem(struct tcb *t, vm_t dev_start);
+
+#endif /* APOS_DEV_H */
diff --git a/include/apos/vmem.h b/include/apos/vmem.h
index 87a3aa6..8057631 100644
--- a/include/apos/vmem.h
+++ b/include/apos/vmem.h
@@ -43,6 +43,7 @@ void map_vmem(struct vm_branch *branch,
 		pm_t paddr, vm_t vaddr, uint8_t flags, enum mm_order order);
 
 void unmap_vmem(struct vm_branch *branch, vm_t vaddr);
+
 int mod_vmem(struct vm_branch *branch, vm_t vaddr, pm_t paddr, uint8_t flags);
 int stat_vmem(struct vm_branch *branch, vm_t vaddr, pm_t *paddr,
 		enum mm_order *order, uint8_t *flags);
@@ -66,9 +67,23 @@ vm_t alloc_uvmem(struct tcb *r, size_t size, uint8_t flags);
 vm_t alloc_fixed_uvmem(struct tcb *r, vm_t start, size_t size, uint8_t flags);
 void free_uvmem(struct tcb *r, vm_t a);
 
-vm_t map_fill_region(struct vm_branch *b, vm_t start, size_t bytes, uint8_t flags);
+vm_t map_fill_region(struct vm_branch *b,
+		int (*vmem_handler)(struct vm_branch *, pm_t *, vm_t, uint8_t, enum mm_order),
+		pm_t offset, vm_t start, size_t bytes, uint8_t flags);
+
+#define map_allocd_region(b, start, bytes, flags)\
+	map_fill_region(b, &alloc_mem_wrapper, 0, start, bytes, flags)
+
+#define unmap_freed_region(b, start, bytes)\
+	map_fill_region(b, &free_mem_wrapper, 0, start, bytes, 0)
+
+int alloc_mem_wrapper(struct vm_branch *b, pm_t *offset, vm_t vaddr, uint8_t flags, enum mm_order order);
+int free_mem_wrapper(struct vm_branch *b, pm_t *offset, vm_t vaddr, uint8_t flags, enum mm_order order);
 
 size_t uvmem_size();
 void set_uvmem_size(size_t s);
 
+/* not entirely sure if this is clean enough, but it'll do for now. */
+struct sp_mem *sp_used_find(struct sp_reg_root *r, vm_t start);
+
 #endif /* APOS_VMEM_H */
-- 
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