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Diffstat (limited to 'src/arch/x86/boot/acpigen.c')
-rw-r--r-- | src/arch/x86/boot/acpigen.c | 517 |
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 0000000..e8cd724 --- /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; +} |