summaryrefslogtreecommitdiff
path: root/src/arch/x86/boot/acpigen.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/arch/x86/boot/acpigen.c')
-rw-r--r--src/arch/x86/boot/acpigen.c517
1 files changed, 517 insertions, 0 deletions
diff --git a/src/arch/x86/boot/acpigen.c b/src/arch/x86/boot/acpigen.c
new file mode 100644
index 0000000000..e8cd724e23
--- /dev/null
+++ b/src/arch/x86/boot/acpigen.c
@@ -0,0 +1,517 @@
+/*
+ * 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 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
+ * 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>
+#include <device/device.h>
+
+static char *gencurrent;
+
+char *len_stack[ACPIGEN_LENSTACK_SIZE];
+int ltop = 0;
+
+static int acpigen_write_len_f(void)
+{
+ 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_qword(uint64_t data)
+{
+ /* qword op */
+ acpigen_emit_byte(0xe);
+ acpigen_emit_byte(data & 0xff);
+ acpigen_emit_byte((data >> 8) & 0xff);
+ acpigen_emit_byte((data >> 16) & 0xff);
+ acpigen_emit_byte((data >> 24) & 0xff);
+ acpigen_emit_byte((data >> 32) & 0xff);
+ acpigen_emit_byte((data >> 40) & 0xff);
+ acpigen_emit_byte((data >> 48) & 0xff);
+ acpigen_emit_byte((data >> 56) & 0xff);
+ return 9;
+}
+
+int acpigen_write_name_byte(const char *name, uint8_t val)
+{
+ int len;
+ len = acpigen_write_name(name);
+ len += acpigen_write_byte(val);
+ return len;
+}
+
+int acpigen_write_name_dword(const char *name, uint32_t val)
+{
+ int len;
+ len = acpigen_write_name(name);
+ len += acpigen_write_dword(val);
+ return len;
+}
+
+int acpigen_write_name_qword(const char *name, uint64_t val)
+{
+ int len;
+ len = acpigen_write_name(name);
+ len += acpigen_write_qword(val);
+ return len;
+}
+
+int acpigen_emit_stream(const char *data, int size)
+{
+ int i;
+ for (i = 0; i < size; i++) {
+ acpigen_emit_byte(data[i]);
+ }
+ 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
+ and 5.3 of ACPI specs 3.0 for details
+*/
+
+static int acpigen_emit_simple_namestring(const char *name) {
+ int i, len = 0;
+ char ud[] = "____";
+ for (i = 0; i < 4; i++) {
+ if ((name[i] == '\0') || (name[i] == '.')) {
+ len += acpigen_emit_stream(ud, 4 - i);
+ break;
+ } else {
+ len += acpigen_emit_byte(name[i]);
+ }
+ }
+ return len;
+}
+
+static int acpigen_emit_double_namestring(const char *name, int dotpos) {
+ int len = 0;
+ /* mark dual name prefix */
+ len += acpigen_emit_byte(0x2e);
+ len += acpigen_emit_simple_namestring(name);
+ len += acpigen_emit_simple_namestring(&name[dotpos + 1]);
+ return len;
+}
+
+static int acpigen_emit_multi_namestring(const char *name) {
+ int len = 0, count = 0;
+ unsigned char *pathlen;
+ /* mark multi name prefix */
+ len += acpigen_emit_byte(0x2f);
+ len += acpigen_emit_byte(0x0);
+ pathlen = ((unsigned char *) acpigen_get_current()) - 1;
+
+ while (name[0] != '\0') {
+ len += acpigen_emit_simple_namestring(name);
+ /* find end or next entity */
+ while ((name[0] != '.') && (name[0] != '\0'))
+ name++;
+ /* forward to next */
+ if (name[0] == '.')
+ name++;
+ count++;
+ }
+
+ pathlen[0] = count;
+ return len;
+}
+
+
+int acpigen_emit_namestring(const char *namepath) {
+ int dotcount = 0, i;
+ int dotpos = 0;
+ int len = 0;
+
+ /* we can start with a \ */
+ if (namepath[0] == '\\') {
+ len += acpigen_emit_byte('\\');
+ namepath++;
+ }
+
+ /* and there can be any number of ^ */
+ while (namepath[0] == '^') {
+ len += acpigen_emit_byte('^');
+ namepath++;
+ }
+
+ ASSERT(namepath[0] != '\0');
+
+ i = 0;
+ while (namepath[i] != '\0') {
+ if (namepath[i] == '.') {
+ dotcount++;
+ dotpos = i;
+ }
+ i++;
+ }
+
+ if (dotcount == 0) {
+ len += acpigen_emit_simple_namestring(namepath);
+ } else if (dotcount == 1) {
+ len += acpigen_emit_double_namestring(namepath, dotpos);
+ } else {
+ len += acpigen_emit_multi_namestring(namepath);
+ }
+ return len;
+}
+
+int acpigen_write_name(const char *name)
+{
+ int len;
+ /* name op */
+ len = acpigen_emit_byte(0x8);
+ return len + acpigen_emit_namestring(name);
+}
+
+int acpigen_write_scope(const char *name)
+{
+ int len;
+ /* scope op */
+ len = acpigen_emit_byte(0x10);
+ len += acpigen_write_len_f();
+ return len + acpigen_emit_namestring(name);
+}
+
+int acpigen_write_processor(u8 cpuindex, u32 pblock_addr, u8 pblock_len)
+{
+/*
+ Processor (\_PR.CPUcpuindex, cpuindex, pblock_addr, pblock_len)
+ {
+*/
+ char pscope[16];
+ int len;
+ /* processor op */
+ acpigen_emit_byte(0x5b);
+ acpigen_emit_byte(0x83);
+ len = acpigen_write_len_f();
+
+ sprintf(pscope, "\\_PR.CPU%x", (unsigned int) cpuindex);
+ len += acpigen_emit_namestring(pscope);
+ acpigen_emit_byte(cpuindex);
+ acpigen_emit_byte(pblock_addr & 0xff);
+ acpigen_emit_byte((pblock_addr >> 8) & 0xff);
+ acpigen_emit_byte((pblock_addr >> 16) & 0xff);
+ acpigen_emit_byte((pblock_addr >> 24) & 0xff);
+ acpigen_emit_byte(pblock_len);
+ return 6 + 2 + len;
+}
+
+int acpigen_write_empty_PCT(void)
+{
+/*
+ Name (_PCT, Package (0x02)
+ {
+ ResourceTemplate ()
+ {
+ Register (FFixedHW,
+ 0x00, // Bit Width
+ 0x00, // Bit Offset
+ 0x0000000000000000, // Address
+ ,)
+ },
+
+ ResourceTemplate ()
+ {
+ Register (FFixedHW,
+ 0x00, // Bit Width
+ 0x00, // Bit Offset
+ 0x0000000000000000, // Address
+ ,)
+ }
+ })
+*/
+ static char stream[] = {
+ 0x08, 0x5F, 0x50, 0x43, 0x54, 0x12, 0x2C, /* 00000030 "0._PCT.," */
+ 0x02, 0x11, 0x14, 0x0A, 0x11, 0x82, 0x0C, 0x00, /* 00000038 "........" */
+ 0x7F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00000040 "........" */
+ 0x00, 0x00, 0x00, 0x00, 0x79, 0x00, 0x11, 0x14, /* 00000048 "....y..." */
+ 0x0A, 0x11, 0x82, 0x0C, 0x00, 0x7F, 0x00, 0x00, /* 00000050 "........" */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00000058 "........" */
+ 0x00, 0x79, 0x00
+ };
+ return acpigen_emit_stream(stream, ARRAY_SIZE(stream));
+}
+
+/* generates a func with max supported P states */
+int acpigen_write_PPC(u8 nr)
+{
+/*
+ Method (_PPC, 0, NotSerialized)
+ {
+ Return (nr)
+ }
+*/
+ int len;
+ /* method op */
+ acpigen_emit_byte(0x14);
+ len = acpigen_write_len_f();
+ len += acpigen_emit_namestring("_PPC");
+ /* no fnarg */
+ acpigen_emit_byte(0x00);
+ /* return */
+ acpigen_emit_byte(0xa4);
+ /* arg */
+ len += acpigen_write_byte(nr);
+ /* add all single bytes */
+ len += 3;
+ acpigen_patch_len(len - 1);
+ return len;
+}
+
+int acpigen_write_PSS_package(u32 coreFreq, u32 power, u32 transLat,
+ u32 busmLat, u32 control, u32 status)
+{
+ int len;
+ len = acpigen_write_package(6);
+ len += acpigen_write_dword(coreFreq);
+ len += acpigen_write_dword(power);
+ len += acpigen_write_dword(transLat);
+ len += acpigen_write_dword(busmLat);
+ len += acpigen_write_dword(control);
+ len += acpigen_write_dword(status);
+ //pkglen without the len opcode
+ acpigen_patch_len(len - 1);
+ return len;
+}
+
+int acpigen_write_PSD_package(u32 domain, u32 numprocs, PSD_coord coordtype)
+{
+ int len, lenh, lenp;
+ lenh = acpigen_write_name("_PSD");
+ lenp = acpigen_write_package(1);
+ len = acpigen_write_package(5);
+ len += acpigen_write_byte(5); // 5 values
+ len += acpigen_write_byte(0); // revision 0
+ len += acpigen_write_dword(domain);
+ len += acpigen_write_dword(coordtype);
+ len += acpigen_write_dword(numprocs);
+ acpigen_patch_len(len - 1);
+ len += lenp;
+ 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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 00:22:42 +0000