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Lots of cosmetic changes to the thread library.

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This commit is contained in:
Bora Sahin
2009-11-05 22:09:37 +02:00
parent 1256f1a13a
commit 20f2b2bfdb
3 changed files with 54 additions and 69 deletions
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43
conts/libl4thread/src/utcb.c
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@@ -12,7 +12,7 @@
#include <utcb.h>
/* Static variable definitions */
static unsigned long utcb_end_max_addr;
static unsigned long lib_utcb_end_addr;
/* Function definitions */
unsigned long get_utcb_addr(void)
@@ -24,7 +24,7 @@ unsigned long get_utcb_addr(void)
utcb_addr = utcb_new_slot(udesc_ptr);
}
if (utcb_addr >= utcb_end_max_addr)
if (utcb_addr >= lib_utcb_end_addr)
return 0;
return utcb_addr;
@@ -47,57 +47,56 @@ static int set_utcb_addr(void)
if ((err = l4_exchange_registers(&exregs, ids.tid)) < 0) {
printf("libl4thread: l4_exchange_registers failed with "
"(%d)!\n", err);
"(%d).\n", err);
return err;
}
return 0;
}
int set_utcb_params(unsigned long utcb_start_addr,
unsigned long utcb_end_addr)
int set_utcb_params(unsigned long utcb_start, unsigned long utcb_end)
{
int err;
/* Ensure that arguments are valid. */
if (IS_UTCB_SETUP()) {
printf("libl4thread: You have already called: %s. Simply, "
"this will have no effect!\n", __FUNCTION__);
printf("libl4thread: You have already called: %s.\n",
__FUNCTION__);
return -EPERM;
}
if (!utcb_start_addr || !utcb_end_addr) {
printf("libl4thread: utcb address range cannot contain "
"0x00000000 as a start and/or end address(es)!\n");
if (!utcb_start || !utcb_end) {
printf("libl4thread: Utcb address range cannot contain "
"0x0 as a start and/or end address(es).\n");
return -EINVAL;
}
/* Check if the start address is aligned on UTCB_SIZE. */
if (utcb_start_addr & !UTCB_SIZE) {
printf("libl4thread: utcb start address must be aligned "
"on UTCB_SIZE(0x%x)\n", UTCB_SIZE);
if (utcb_start & !UTCB_SIZE) {
printf("libl4thread: Utcb start address must be aligned "
"on UTCB_SIZE(0x%x).\n", UTCB_SIZE);
return -EINVAL;
}
/* The range must be a valid one. */
if (utcb_start_addr >= utcb_end_addr) {
printf("libl4thread: utcb end address must be bigger "
"than utcb start address!\n");
if (utcb_start >= utcb_end) {
printf("libl4thread: Utcb end address must be bigger "
"than utcb start address.\n");
return -EINVAL;
}
/*
* This check guarantees two things:
* 1. The range must be multiple of UTCB_SIZE, at least one item.
* 2. utcb_end_addr is aligned on UTCB_SIZE
* 2. utcb_end is aligned on UTCB_SIZE
*/
if ((utcb_end_addr - utcb_start_addr) % UTCB_SIZE) {
printf("libl4thread: the given range size must be multiple "
"of the utcb size(%d)!\n", UTCB_SIZE);
if ((utcb_end - utcb_start) % UTCB_SIZE) {
printf("libl4thread: The given range size must be multiple "
"of the utcb size(%d).\n", UTCB_SIZE);
return -EINVAL;
}
/* Arguments passed the validity tests. */
/* Init utcb virtual address pool */
utcb_pool_init(utcb_start_addr, utcb_end_addr);
utcb_pool_init(utcb_start, utcb_end);
utcb_end_max_addr = utcb_end_addr;
lib_utcb_end_addr = utcb_end;
/* The very first thread's utcb address is assigned. */
if ((err = set_utcb_addr()) < 0)