tasking_helpers_c.c File Reference

#include "../../tasking.h"
#include "../paging.h"
#include "../tasking_helpers.h"
#include "../../pmem.h"
#include <stddef.h>
#include <stdint.h>

Functions
static char	is_kstack_allocated (size_t index)
static void	mark_kstack_allocated (size_t index)
static int	new_kstack ()
void	setup_kstack (Thread *thread, void *param1, void *param2, char kmode, void *eip)
void	free_kstack (void *stack_ptr)

Variables
static void **	kstacks =(void*)0xC8000000
	Pointer to all the thread kernel stacks.
static char	kstack_bmap [(218 *1024)/8] ={0}
	Bitmap of what kernel stacks have been allocated.

Function Documentation

free_kstack()

void free_kstack

(

void *

stack_ptr

)

Frees a kernel stack so it can be used again

Parameters

stack_ptr

The kernel stack to free

is_kstack_allocated()

static char is_kstack_allocated ( size_t  index )

static

Check whether a kernel stack is allocated

Parameters

index

The kernel stack to check

Returns

whether the kernel stack is allocated

mark_kstack_allocated()

static void mark_kstack_allocated ( size_t  index )

static

Mark that a kernel stack is allocated

Parameters

index

The kernel stack to mark

new_kstack()

static int new_kstack ( )

static

Allocate a kernel stack for a thread

Returns

The number of the new kernel stack, or -1 if none are unallocated.

setup_kstack()

void setup_kstack	(	Thread *	thread,
		void *	param1,
		void *	param2,
		char	kmode,
		void *	eip
	)

Setup a kernel stack for a thread

Parameters

thread	The thread to setup a stack for
param1	The thread's start function first parameter
param2	The thread's start function second parameter
kmode	Whether the thread is a kernel mode thread
eip	The start address of the thread