* 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.
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
#include <string.h>
#include <arch/acpigen.h>
#include <console/console.h>
+#include <device/device.h>
static char *gencurrent;
return size;
}
-/* The NameString are bit tricky, each element can be 4 chars, if
- less its padded with underscore. Check 18.2.2 and 18.4
+/* The NameString are bit tricky, each element can be 4 chars, if
+ less its padded with underscore. Check 18.2.2 and 18.4
and 5.3 of ACPI specs 3.0 for details
*/
len += acpigen_emit_stream(ud, 4 - i);
break;
} else {
- len += acpigen_emit_byte(name[i]);
+ len += acpigen_emit_byte(name[i]);
}
}
return len;
}
static int acpigen_emit_double_namestring(const char *name, int dotpos) {
- int len = 0;
+ int len = 0;
/* mark dual name prefix */
len += acpigen_emit_byte(0x2e);
len += acpigen_emit_simple_namestring(name);
static int acpigen_emit_multi_namestring(const char *name) {
int len = 0, count = 0;
- unsigned char *pathlen;
+ unsigned char *pathlen;
/* mark multi name prefix */
len += acpigen_emit_byte(0x2f);
len += acpigen_emit_byte(0x0);
if (dotcount == 0) {
len += acpigen_emit_simple_namestring(namepath);
- } else if (dotcount == 1) {
+ } else if (dotcount == 1) {
len += acpigen_emit_double_namestring(namepath, dotpos);
} else {
len += acpigen_emit_multi_namestring(namepath);
acpigen_patch_len(len - 1);
return len + lenh;
}
+
+int acpigen_write_mem32fixed(int readwrite, u32 base, u32 size)
+{
+ /*
+ * acpi 4.0 section 6.4.3.4: 32-Bit Fixed Memory Range Descriptor
+ * Byte 0:
+ * Bit7 : 1 => big item
+ * Bit6-0: 0000110 (0x6) => 32-bit fixed memory
+ */
+ acpigen_emit_byte(0x86);
+ /* Byte 1+2: length (0x0009) */
+ acpigen_emit_byte(0x09);
+ acpigen_emit_byte(0x00);
+ /* bit1-7 are ignored */
+ acpigen_emit_byte(readwrite ? 0x01 : 0x00);
+ acpigen_emit_byte(base & 0xff);
+ acpigen_emit_byte((base >> 8) & 0xff);
+ acpigen_emit_byte((base >> 16) & 0xff);
+ acpigen_emit_byte((base >> 24) & 0xff);
+ acpigen_emit_byte(size & 0xff);
+ acpigen_emit_byte((size >> 8) & 0xff);
+ acpigen_emit_byte((size >> 16) & 0xff);
+ acpigen_emit_byte((size >> 24) & 0xff);
+ return 12;
+}
+
+int acpigen_write_io16(u16 min, u16 max, u8 align, u8 len, u8 decode16)
+{
+ /*
+ * acpi 4.0 section 6.4.2.6: I/O Port Descriptor
+ * Byte 0:
+ * Bit7 : 0 => small item
+ * Bit6-3: 1000 (0x8) => I/O port descriptor
+ * Bit2-0: 111 (0x7) => 7 Bytes long
+ */
+ acpigen_emit_byte(0x47);
+ /* does the device decode all 16 or just 10 bits? */
+ /* bit1-7 are ignored */
+ acpigen_emit_byte(decode16 ? 0x01 : 0x00);
+ /* minimum base address the device may be configured for */
+ acpigen_emit_byte(min & 0xff);
+ acpigen_emit_byte((min >> 8) & 0xff);
+ /* maximum base address the device may be configured for */
+ acpigen_emit_byte(max & 0xff);
+ acpigen_emit_byte((max >> 8) & 0xff);
+ /* alignment for min base */
+ acpigen_emit_byte(align & 0xff);
+ acpigen_emit_byte(len & 0xff);
+ return 8;
+}
+
+int acpigen_write_resourcetemplate_header(void)
+{
+ int len;
+ /*
+ * A ResourceTemplate() is a Buffer() with a
+ * (Byte|Word|DWord) containing the length, followed by one or more
+ * resource items, terminated by the end tag
+ * (small item 0xf, len 1)
+ */
+ len = acpigen_emit_byte(0x11); /* Buffer opcode */
+ len += acpigen_write_len_f();
+ len += acpigen_emit_byte(0x0b); /* Word opcode */
+ len_stack[ltop++] = acpigen_get_current();
+ len += acpigen_emit_byte(0x00);
+ len += acpigen_emit_byte(0x00);
+ return len;
+}
+
+int acpigen_write_resourcetemplate_footer(int len)
+{
+ char *p = len_stack[--ltop];
+ /*
+ * end tag (acpi 4.0 Section 6.4.2.8)
+ * 0x79 <checksum>
+ * 0x00 is treated as a good checksum according to the spec
+ * and is what iasl generates.
+ */
+ len += acpigen_emit_byte(0x79);
+ len += acpigen_emit_byte(0x00);
+ /* patch len word */
+ p[0] = (len-6) & 0xff;
+ p[1] = ((len-6) >> 8) & 0xff;
+ /* patch len field */
+ acpigen_patch_len(len-1);
+ return 2;
+}
+
+static void acpigen_add_mainboard_rsvd_mem32(void *gp, struct device *dev,
+ struct resource *res)
+{
+ acpigen_write_mem32fixed(0, res->base, res->size);
+}
+
+static void acpigen_add_mainboard_rsvd_io(void *gp, struct device *dev,
+ struct resource *res)
+{
+ resource_t base = res->base;
+ resource_t size = res->size;
+ while (size > 0) {
+ resource_t sz = size > 255 ? 255 : size;
+ acpigen_write_io16(base, base, 0, sz, 1);
+ size -= sz;
+ base += sz;
+ }
+}
+
+int acpigen_write_mainboard_resource_template(void)
+{
+ int len;
+ char *start;
+ char *end;
+ len = acpigen_write_resourcetemplate_header();
+ start = acpigen_get_current();
+
+ /* Add reserved memory ranges */
+ search_global_resources(
+ IORESOURCE_MEM | IORESOURCE_RESERVE,
+ IORESOURCE_MEM | IORESOURCE_RESERVE,
+ acpigen_add_mainboard_rsvd_mem32, 0);
+
+ /* Add reserved io ranges */
+ search_global_resources(
+ IORESOURCE_IO | IORESOURCE_RESERVE,
+ IORESOURCE_IO | IORESOURCE_RESERVE,
+ acpigen_add_mainboard_rsvd_io, 0);
+
+ end = acpigen_get_current();
+ len += end-start;
+ len += acpigen_write_resourcetemplate_footer(len);
+ return len;
+}
+
+int acpigen_write_mainboard_resources(const char *scope, const char *name)
+{
+ int len;
+ len = acpigen_write_scope(scope);
+ len += acpigen_write_name(name);
+ len += acpigen_write_mainboard_resource_template();
+ acpigen_patch_len(len - 1);
+ return len;
+}
projects / coreboot.git / blobdiff