diff options
Diffstat (limited to 'qemu/roms/ipxe/src/arch/x86/core/cpuid_settings.c')
| -rw-r--r-- | qemu/roms/ipxe/src/arch/x86/core/cpuid_settings.c | 278 |
1 files changed, 0 insertions, 278 deletions
diff --git a/qemu/roms/ipxe/src/arch/x86/core/cpuid_settings.c b/qemu/roms/ipxe/src/arch/x86/core/cpuid_settings.c deleted file mode 100644 index 08bd3918a..000000000 --- a/qemu/roms/ipxe/src/arch/x86/core/cpuid_settings.c +++ /dev/null @@ -1,278 +0,0 @@ -/* - * Copyright (C) 2013 Michael Brown <mbrown@fensystems.co.uk>. - * - * 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; either version 2 of the - * License, or any later version. - * - * 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 Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -#include <string.h> -#include <errno.h> -#include <byteswap.h> -#include <ipxe/init.h> -#include <ipxe/settings.h> -#include <ipxe/cpuid.h> - -/** @file - * - * x86 CPUID settings - * - * CPUID settings are numerically encoded as: - * - * Bit 31 Extended function - * Bits 30-28 Unused - * Bits 27-24 Number of consecutive functions to call, minus one - * Bit 23 Return result as little-endian (used for strings) - * Bits 22-18 Unused - * Bits 17-16 Number of registers in register array, minus one - * Bits 15-8 Array of register indices. First entry in array is in - * bits 9-8. Indices are 0-%eax, 1-%ebx, 2-%ecx, 3-%edx. - * Bits 7-0 Starting function number (excluding "extended" bit) - * - * This encoding scheme is designed to allow the common case of - * extracting a single register from a single function to be encoded - * using "cpuid/<register>.<function>", e.g. "cpuid/2.0x80000001" to - * retrieve the value of %ecx from calling CPUID with %eax=0x80000001. - */ - -/** CPUID setting tag register indices */ -enum cpuid_registers { - CPUID_EAX = 0, - CPUID_EBX = 1, - CPUID_ECX = 2, - CPUID_EDX = 3, -}; - -/** - * Construct CPUID setting tag - * - * @v function Starting function number - * @v num_functions Number of consecutive functions - * @v little_endian Return result as little-endian - * @v num_registers Number of registers in register array - * @v register1 First register in register array (or zero, if empty) - * @v register2 Second register in register array (or zero, if empty) - * @v register3 Third register in register array (or zero, if empty) - * @v register4 Fourth register in register array (or zero, if empty) - * @ret tag Setting tag - */ -#define CPUID_TAG( function, num_functions, little_endian, num_registers, \ - register1, register2, register3, register4 ) \ - ( (function) | ( ( (num_functions) - 1 ) << 24 ) | \ - ( (little_endian) << 23 ) | ( ( (num_registers) - 1) << 16 ) | \ - ( (register1) << 8 ) | ( (register2) << 10 ) | \ - ( (register3) << 12 ) | ( (register4) << 14 ) ) - -/** - * Extract endianness from CPUID setting tag - * - * @v tag Setting tag - * @ret little_endian Result should be returned as little-endian - */ -#define CPUID_LITTLE_ENDIAN( tag ) ( (tag) & 0x00800000UL ) - -/** - * Extract starting function number from CPUID setting tag - * - * @v tag Setting tag - * @ret function Starting function number - */ -#define CPUID_FUNCTION( tag ) ( (tag) & 0x800000ffUL ) - -/** - * Extract number of consecutive functions from CPUID setting tag - * - * @v tag Setting tag - * @ret num_functions Number of consecutive functions - */ -#define CPUID_NUM_FUNCTIONS( tag ) ( ( ( (tag) >> 24 ) & 0xf ) + 1 ) - -/** - * Extract register array from CPUID setting tag - * - * @v tag Setting tag - * @ret registers Register array - */ -#define CPUID_REGISTERS( tag ) ( ( (tag) >> 8 ) & 0xff ) - -/** - * Extract number of registers from CPUID setting tag - * - * @v tag Setting tag - * @ret num_registers Number of registers within register array - */ -#define CPUID_NUM_REGISTERS( tag ) ( ( ( (tag) >> 16 ) & 0x3 ) + 1 ) - -/** CPUID settings scope */ -static const struct settings_scope cpuid_settings_scope; - -/** - * Check applicability of CPUID setting - * - * @v settings Settings block - * @v setting Setting - * @ret applies Setting applies within this settings block - */ -static int cpuid_settings_applies ( struct settings *settings __unused, - const struct setting *setting ) { - - return ( setting->scope == &cpuid_settings_scope ); -} - -/** - * Fetch value of CPUID setting - * - * @v settings Settings block - * @v setting Setting to fetch - * @v data Buffer to fill with setting data - * @v len Length of buffer - * @ret len Length of setting data, or negative error - */ -static int cpuid_settings_fetch ( struct settings *settings, - struct setting *setting, - void *data, size_t len ) { - uint32_t function; - uint32_t max_function; - uint32_t num_functions; - uint32_t registers; - uint32_t num_registers; - uint32_t buf[4]; - uint32_t output; - uint32_t discard_b; - uint32_t discard_c; - uint32_t discard_d; - size_t frag_len; - size_t result_len = 0; - - /* Fail unless CPUID is supported */ - if ( ! cpuid_is_supported() ) { - DBGC ( settings, "CPUID not supported\n" ); - return -ENOTSUP; - } - - /* Find highest supported function number within this set */ - function = CPUID_FUNCTION ( setting->tag ); - cpuid ( function & CPUID_EXTENDED, &max_function, &discard_b, - &discard_c, &discard_d ); - - /* Fail if maximum function number is meaningless (e.g. if we - * are attempting to call an extended function on a CPU which - * does not support them). - */ - if ( ( max_function & CPUID_AMD_CHECK_MASK ) != - ( function & CPUID_AMD_CHECK_MASK ) ) { - DBGC ( settings, "CPUID invalid maximum function\n" ); - return -ENOTSUP; - } - - /* Call each function in turn */ - num_functions = CPUID_NUM_FUNCTIONS ( setting->tag ); - for ( ; num_functions-- ; function++ ) { - - /* Fail if this function is not supported */ - if ( function > max_function ) { - DBGC ( settings, "CPUID function %#08x not supported\n", - function ); - return -ENOTSUP; - } - - /* Issue CPUID */ - cpuid ( function, &buf[CPUID_EAX], &buf[CPUID_EBX], - &buf[CPUID_ECX], &buf[CPUID_EDX] ); - DBGC ( settings, "CPUID %#08x => %#08x:%#08x:%#08x:%#08x\n", - function, buf[0], buf[1], buf[2], buf[3] ); - - /* Copy results to buffer */ - registers = CPUID_REGISTERS ( setting->tag ); - num_registers = CPUID_NUM_REGISTERS ( setting->tag ); - for ( ; num_registers-- ; registers >>= 2 ) { - output = buf[ registers & 0x3 ]; - if ( ! CPUID_LITTLE_ENDIAN ( setting->tag ) ) - output = cpu_to_be32 ( output ); - frag_len = sizeof ( output ); - if ( frag_len > len ) - frag_len = len; - memcpy ( data, &output, frag_len ); - data += frag_len; - len -= frag_len; - result_len += sizeof ( output ); - } - } - - /* Set type if not already specified */ - if ( ! setting->type ) - setting->type = &setting_type_hexraw; - - return result_len; -} - -/** CPUID settings operations */ -static struct settings_operations cpuid_settings_operations = { - .applies = cpuid_settings_applies, - .fetch = cpuid_settings_fetch, -}; - -/** CPUID settings */ -static struct settings cpuid_settings = { - .refcnt = NULL, - .siblings = LIST_HEAD_INIT ( cpuid_settings.siblings ), - .children = LIST_HEAD_INIT ( cpuid_settings.children ), - .op = &cpuid_settings_operations, - .default_scope = &cpuid_settings_scope, -}; - -/** Initialise CPUID settings */ -static void cpuid_settings_init ( void ) { - int rc; - - if ( ( rc = register_settings ( &cpuid_settings, NULL, - "cpuid" ) ) != 0 ) { - DBG ( "CPUID could not register settings: %s\n", - strerror ( rc ) ); - return; - } -} - -/** CPUID settings initialiser */ -struct init_fn cpuid_settings_init_fn __init_fn ( INIT_NORMAL ) = { - .initialise = cpuid_settings_init, -}; - -/** CPU vendor setting */ -const struct setting cpuvendor_setting __setting ( SETTING_HOST_EXTRA, - cpuvendor ) = { - .name = "cpuvendor", - .description = "CPU vendor", - .tag = CPUID_TAG ( CPUID_VENDOR_ID, 1, 1, 3, - CPUID_EBX, CPUID_EDX, CPUID_ECX, 0 ), - .type = &setting_type_string, - .scope = &cpuid_settings_scope, -}; - -/** CPU model setting */ -const struct setting cpumodel_setting __setting ( SETTING_HOST_EXTRA, - cpumodel ) = { - .name = "cpumodel", - .description = "CPU model", - .tag = CPUID_TAG ( CPUID_MODEL, 3, 1, 4, - CPUID_EAX, CPUID_EBX, CPUID_ECX, CPUID_EDX ), - .type = &setting_type_string, - .scope = &cpuid_settings_scope, -}; |