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Remove page frame allocator

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This commit is contained in:
Alex Kotov 2020-11-26 01:30:35 +05:00
parent ecb719af13
commit a5b7bd8ef2
Signed by: kotovalexarian
GPG key ID: 553C0EBBEB5D5F08
4 changed files with 0 additions and 109 deletions
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1
kernelmq/Makefile
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@ -14,7 +14,6 @@ OBJS += main.c.o
OBJS += init.c.o OBJS += init.c.o
OBJS += multiboot.c.o OBJS += multiboot.c.o
OBJS += panic.c.o panic.asm.cpp.o OBJS += panic.c.o panic.asm.cpp.o
OBJS += pfa.c.o
OBJS += paging.c.o paging.asm.cpp.o OBJS += paging.c.o paging.asm.cpp.o
OBJS += page_dir.c.o OBJS += page_dir.c.o

4
kernelmq/init.c
View file

@ -1,5 +1,4 @@
#include "panic.h" #include "panic.h"
#include "pfa.h"
#include "protected.h" #include "protected.h"
#include "paging.h" #include "paging.h"
@ -19,9 +18,6 @@ void init(const struct KernelMQ_Info *const kinfo_ptr)
assert(kernelmq_info_validate_and_copy(&kinfo, kinfo_ptr), "Invalid kernel information."); assert(kernelmq_info_validate_and_copy(&kinfo, kinfo_ptr), "Invalid kernel information.");
pfa_initialize(&kinfo);
pfa_print_info();
protected_initialize(&kinfo); protected_initialize(&kinfo);
// Set up a new post-relocate bootstrap pagetable so that // Set up a new post-relocate bootstrap pagetable so that

86
kernelmq/pfa.c
View file

@ -1,86 +0,0 @@
#include "pfa.h"
#include "config.h"
#include "panic.h"
#include "logger.h"
#include "stdlib.h"
#define FRAMES_COUNT (PAGE_DIR_LENGTH * PAGE_TABLE_LENGTH)
static unsigned char frames[FRAMES_COUNT];
static void mark_used(unsigned long base, unsigned long limit);
void pfa_initialize(const struct KernelMQ_Info *const kinfo)
{
logger_info_from("pfa", "Initialize page frame allocator.");
kmemset(frames, 0, sizeof(frames));
mark_used(0, MEM_UPPER_BASE - 1);
mark_used(kinfo->kernel_phys_base, kinfo->kernel_phys_limit);
for (unsigned int i = 0; i < kinfo->modules_count; ++i) {
const struct KernelMQ_Info_Module *const module = &kinfo->modules[i];
mark_used(module->base, module->limit);
}
for (unsigned int i = 0; i < kinfo->areas_count; ++i) {
const struct KernelMQ_Info_Area *const area = &kinfo->areas[i];
if (!area->is_available) {
mark_used(area->base, area->limit);
}
}
}
void pfa_print_info()
{
unsigned char started = 0;
unsigned int start = 0;
for (unsigned int index = 0; index <= FRAMES_COUNT; ++index) {
if (frames[index]) {
if (!started) {
started = 1;
start = index;
}
}
else {
if (started) {
const unsigned int end = index - 1;
if (start < end) {
logger_debug_from(
"pfa",
"Pages allocated: %u-%u",
start * PAGE_SIZE,
end * PAGE_SIZE
);
}
else {
logger_debug_from(
"pfa",
"Page allocated: %u",
start * PAGE_SIZE
);
}
}
started = 0;
}
}
}
void mark_used(const unsigned long base, const unsigned long limit)
{
const unsigned int start = base / PAGE_SIZE;
const unsigned int end = limit / PAGE_SIZE;
for (unsigned int i = start; i <= end; ++i) {
frames[i] = 0xFF;
}
}

18
kernelmq/pfa.h
View file

@ -1,18 +0,0 @@
#ifndef KERNELMQ_INCLUDED_PFA
#define KERNELMQ_INCLUDED_PFA 1
#include "info.h"
#ifdef __cplusplus
extern "C" {
#endif
void pfa_initialize(const struct KernelMQ_Info *kinfo);
void pfa_print_info();
#ifdef __cplusplus
}
#endif
#endif