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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2009 Rudolf Marek <r.marek@assembler.cz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* how many nesting we support */
#define ACPIGEN_LENSTACK_SIZE 10
/* if you need to change this, change the acpigen_write_f and
acpigen_patch_len */
#define ACPIGEN_MAXLEN 0xfff
#include <string.h>
#include <arch/acpigen.h>
#include <console/console.h>
static char *gencurrent;
char *len_stack[ACPIGEN_LENSTACK_SIZE];
int ltop = 0;
static int acpigen_write_len_f()
{
ASSERT(ltop < (ACPIGEN_LENSTACK_SIZE - 1))
len_stack[ltop++] = gencurrent;
acpigen_emit_byte(0);
acpigen_emit_byte(0);
return 2;
}
void acpigen_patch_len(int len)
{
ASSERT(len <= ACPIGEN_MAXLEN)
ASSERT(ltop > 0)
char *p = len_stack[--ltop];
/* generate store length for 0xfff max */
p[0] = (0x40 | (len & 0xf));
p[1] = (len >> 4 & 0xff);
}
void acpigen_set_current(char *curr) {
gencurrent = curr;
}
char *acpigen_get_current(void) {
return gencurrent;
}
int acpigen_emit_byte(unsigned char b)
{
(*gencurrent++) = b;
return 1;
}
int acpigen_write_package(int nr_el)
{
int len;
/* package op */
acpigen_emit_byte(0x12);
len = acpigen_write_len_f();
acpigen_emit_byte(nr_el);
return len + 2;
}
int acpigen_write_byte(unsigned int data)
{
/* byte op */
acpigen_emit_byte(0xa);
acpigen_emit_byte(data & 0xff);
return 2;
}
int acpigen_write_dword(unsigned int data)
{
/* dword op */
acpigen_emit_byte(0xc);
acpigen_emit_byte(data & 0xff);
acpigen_emit_byte((data >> 8) & 0xff);
acpigen_emit_byte((data >> 16) & 0xff);
acpigen_emit_byte((data >> 24) & 0xff);
return 5;
}
int acpigen_write_name_byte(char *name, uint8_t val) {
int len;
len = acpigen_write_name(name);
len += acpigen_write_byte(val);
return len;
}
int acpigen_write_name_dword(char *name, uint32_t val) {
int len;
len = acpigen_write_name(name);
len += acpigen_write_dword(val);
return len;
}
int acpigen_emit_stream(char *data, int size) {
int i;
for (i = 0; i < size; i++) {
acpigen_emit_byte(data[i]);
}
return size;
}
int acpigen_write_name(char *name)
{
int len = strlen(name);
/* name op */
acpigen_emit_byte(0x8);
acpigen_emit_stream(name, len);
return len + 1;
}
int acpigen_write_scope(char *name)
{
int len;
/* scope op */
acpigen_emit_byte(0x10);
len = acpigen_write_len_f();
return len + acpigen_emit_stream(name, strlen(name)) + 1;
}
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