From 9b22a6965579ea1867aea291d910c96f386b518b Mon Sep 17 00:00:00 2001
From: Brett Weiland <brett_weiland@bpcspace.com>
Date: Tue, 24 Aug 2021 14:09:29 -0500
Subject: major backup 8.24.21

---
 src/include/paging.h | 95 ++++++----------------------------------------------
 1 file changed, 11 insertions(+), 84 deletions(-)

(limited to 'src/include/paging.h')

diff --git a/src/include/paging.h b/src/include/paging.h
index 3d31ef2..16afae2 100644
--- a/src/include/paging.h
+++ b/src/include/paging.h
@@ -1,96 +1,23 @@
-#include <stdbool.h>
-//paging errors
-#define PAGEMAP_LOCATION 0x4000
 #ifndef _PAGE_H_
 #define _PAGE_H_ 
-#include <stdint.h>
-
-#define PAGE_VIRT_UNALIGNED 0x01 
-#define PAGE_PHYS_UNALIGNED 0x02
-#define PAGE_PHYS_INVALID   0x03
-#define PAGE_VIRT_INVALID   0x04
-
-//*
-typedef struct __attribute__((packed)) {
-  unsigned int present : 1;            // present, must be one when accessed.
-  unsigned int read_write : 1;         // if set to one, read and write is set
-  unsigned int user : 1;               // another bit we'll never use, for seperating CPL 0-2 and 3+
-  unsigned int writethrough_cache : 1; // honestly maybe I should look into caching
-  unsigned int cachable : 1;           // hardware chaching. 0 is enabled, whats the worst that could happen? 
-  unsigned int accessed : 1;           // we'll never use any of these!
-  unsigned int zg0 : 1;                // needs to be (and will be) zero'd
-  unsigned int size : 1;
-  unsigned int zg1 : 1;                // needs to be (and will be) zero'd
-  unsigned int software_marks : 3;     // available for our own use, I doubt we'll use it in such a simple thing
-  
-  uintptr_t base_ptr : 40;
-  unsigned int sign:11;
-} page_entry;
-
-
-typedef struct __attribute__((packed)) {
-  page_entry pml4e[512];
-  page_entry pdpe[512];
-  page_entry pde[512];
-  page_entry pte[512];
-} page_table;
-
-#define MEM_AVAILABLE             1
-#define MEM_RESERVED              2
-#define MEM_APCI_RECLAIMABLE      3
-#define MEM_APCI_NVS              4
-#define MEM_BAD                   5
-
-#define PAGE_SIZE_4K              12
-#define PAGE_SIZE_2M              21
-#define PAGE_SIZE_1G              30
 
-#define MAX_BUDDY_ORDER           8
-
-#define MAX_ZONE_CNT              16 //should cover all cases
-
-struct memory_table {
-  void *base;
-  uint64_t length;
-  uint32_t type;
-  uint32_t ACPI; 
-} __attribute__((packed));
-
-/**
- * the bsizes are there so we don't have to calculate it every time.
- *
- * Keep in mind that at if the allocator reaches the last buddy, 
- * it _will_ have to calculate the bitwidth, even if it's a multiple of 64.
- * This scenario hopefully won't happen much during time sensitive areas, 
- * and (I think) linux calculates the buddy size every single time anyway.
-**/
-struct phys_map {
-  struct phys_map *next;
-  void *zone_paddr;
-  uint64_t extra_bits;
-  uint64_t *buddy[MAX_BUDDY_ORDER];
-};
+#include <stdbool.h>
+#include <stdint.h>
+#include <stddef.h>
 
-//clean up doing extra work some other time
-#define LSIZE_FROM_BITLEN(bitlen) (((bitlen) + 63) / 64)
-#define BITLEN_FROM_LSIZE(lsize) ((lsize) * 64)
-#define GET_BUDDY_BITLEN(zone_len, order) ((zone_len) / (0x1000 << (order)))
-#define GET_ORDER_CHUNKSIZE(order) (0x1000 << ((order)))
 
 
+void unmap_lowmem();
+size_t map_complete_physical();
+void debug_print_memory();
 
-extern void* _meminfo_loc;
-extern void* _stage2_pagetable;
 
-bool map_page(void *virtual_addr, void *physical_addr, uint8_t PAGE_SIZE);
-void debug_print_memory();
-void create_pagetable_stage2(uint64_t free_mem);
-void init_memory(); //TODO removeme
-void init_pmap();
-void *palloc();
-void *pfree();
+struct phys_map *init_pmap(size_t pagetable_size);
+void *palloc(size_t size); 
+void pfree(void *addr, size_t size);
 void debug_pmap();
+void get_mem_capabilities();
+void ram_stresser();
 
 
 #endif
-
-- 
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