From b14d0afe86966b91ad6a40816439cdc34602b49e Mon Sep 17 00:00:00 2001
From: Nao Pross <naopross@thearcway.org>
Date: Tue, 4 Jul 2017 11:35:23 +0200
Subject: new structure for process management, structures to discuss

the idea behind kernel/include/progman.h was good but the implementation was
very not unix-like, so I made a new file under
kernel/include/process.h that will implement the same features

other changes:
  - move usart register structs definitions outside of the device
  - remove old build files
  - delete boot.h and boot_loader.h (as they weren't used by anything)
  - change on makefile to build binary with `makebin` instead of `xxd`
  - new file memory.h to implement memory mapping and mmu control
  - new type `uint` in types.h
---
 sw/z80/kernel/memory.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 sw/z80/kernel/memory.c

(limited to 'sw/z80/kernel/memory.c')

diff --git a/sw/z80/kernel/memory.c b/sw/z80/kernel/memory.c
new file mode 100644
index 0000000..f174906
--- /dev/null
+++ b/sw/z80/kernel/memory.c
@@ -0,0 +1,43 @@
+#include "memory.h"
+
+struct page pages_table[PAGES_MAX_COUNT];
+
+int mmu_write_table(void)
+{
+    int i;
+
+    for (i = 0; i < PAGES_MAX_COUNT; i++) {
+        if (pages_table[i].used) {
+            // write to mmu table
+        }
+    }
+
+    return 0;
+}
+
+int page_map(int page, int pid, uint16_t addr)
+{
+    if (page >= PAGES_MAX_COUNT)
+        return -1;
+
+    if (pages_table[page].used)
+        return -2;
+
+    pages_table[page].addr = addr;
+    pages_table[page].pid = pid;
+
+    pages_table[page].used = 1;
+    return 0;
+}
+
+int page_unmap(int page)
+{
+    if (page >= PAGES_MAX_COUNT)
+        return -1;
+
+    if (pages_table[page].used == 0)
+        return -2;
+
+    pages_table[page].used = 0;
+    return 0;
+}
-- 
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