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#ifndef ARCH_CPU_H
#define ARCH_CPU_H
#include <stdint.h>
/*
* EFLAGS bits
*/
#define X86_EFLAGS_CF 0x00000001 /* Carry Flag */
#define X86_EFLAGS_PF 0x00000004 /* Parity Flag */
#define X86_EFLAGS_AF 0x00000010 /* Auxillary carry Flag */
#define X86_EFLAGS_ZF 0x00000040 /* Zero Flag */
#define X86_EFLAGS_SF 0x00000080 /* Sign Flag */
#define X86_EFLAGS_TF 0x00000100 /* Trap Flag */
#define X86_EFLAGS_IF 0x00000200 /* Interrupt Flag */
#define X86_EFLAGS_DF 0x00000400 /* Direction Flag */
#define X86_EFLAGS_OF 0x00000800 /* Overflow Flag */
#define X86_EFLAGS_IOPL 0x00003000 /* IOPL mask */
#define X86_EFLAGS_NT 0x00004000 /* Nested Task */
#define X86_EFLAGS_RF 0x00010000 /* Resume Flag */
#define X86_EFLAGS_VM 0x00020000 /* Virtual Mode */
#define X86_EFLAGS_AC 0x00040000 /* Alignment Check */
#define X86_EFLAGS_VIF 0x00080000 /* Virtual Interrupt Flag */
#define X86_EFLAGS_VIP 0x00100000 /* Virtual Interrupt Pending */
#define X86_EFLAGS_ID 0x00200000 /* CPUID detection flag */
struct cpuid_result {
uint32_t eax;
uint32_t ebx;
uint32_t ecx;
uint32_t edx;
};
/*
* Generic CPUID function
*/
static inline struct cpuid_result cpuid(int op)
{
struct cpuid_result result;
asm volatile(
"mov %%ebx, %%edi;"
"cpuid;"
"mov %%ebx, %%esi;"
"mov %%edi, %%ebx;"
: "=a" (result.eax),
"=S" (result.ebx),
"=c" (result.ecx),
"=d" (result.edx)
: "0" (op)
: "edi");
return result;
}
/*
* Generic Extended CPUID function
*/
static inline struct cpuid_result cpuid_ext(int op, unsigned ecx)
{
struct cpuid_result result;
asm volatile(
"mov %%ebx, %%edi;"
"cpuid;"
"mov %%ebx, %%esi;"
"mov %%edi, %%ebx;"
: "=a" (result.eax),
"=S" (result.ebx),
"=c" (result.ecx),
"=d" (result.edx)
: "0" (op), "2" (ecx)
: "edi");
return result;
}
/*
* CPUID functions returning a single datum
*/
static inline unsigned int cpuid_eax(unsigned int op)
{
unsigned int eax;
__asm__("mov %%ebx, %%edi;"
"cpuid;"
"mov %%edi, %%ebx;"
: "=a" (eax)
: "0" (op)
: "ecx", "edx", "edi");
return eax;
}
static inline unsigned int cpuid_ebx(unsigned int op)
{
unsigned int eax, ebx;
__asm__("mov %%ebx, %%edi;"
"cpuid;"
"mov %%ebx, %%esi;"
"mov %%edi, %%ebx;"
: "=a" (eax), "=S" (ebx)
: "0" (op)
: "ecx", "edx", "edi");
return ebx;
}
static inline unsigned int cpuid_ecx(unsigned int op)
{
unsigned int eax, ecx;
__asm__("mov %%ebx, %%edi;"
"cpuid;"
"mov %%edi, %%ebx;"
: "=a" (eax), "=c" (ecx)
: "0" (op)
: "edx", "edi");
return ecx;
}
static inline unsigned int cpuid_edx(unsigned int op)
{
unsigned int eax, edx;
__asm__("mov %%ebx, %%edi;"
"cpuid;"
"mov %%edi, %%ebx;"
: "=a" (eax), "=d" (edx)
: "0" (op)
: "ecx", "edi");
return edx;
}
#define X86_VENDOR_INVALID 0
#define X86_VENDOR_INTEL 1
#define X86_VENDOR_CYRIX 2
#define X86_VENDOR_AMD 3
#define X86_VENDOR_UMC 4
#define X86_VENDOR_NEXGEN 5
#define X86_VENDOR_CENTAUR 6
#define X86_VENDOR_RISE 7
#define X86_VENDOR_TRANSMETA 8
#define X86_VENDOR_NSC 9
#define X86_VENDOR_SIS 10
#define X86_VENDOR_ANY 0xfe
#define X86_VENDOR_UNKNOWN 0xff
#if !defined(__PRE_RAM__) && !defined(__SMM__)
#include <device/device.h>
int cpu_phys_address_size(void);
int cpu_have_cpuid(void);
struct cpu_device_id {
unsigned vendor;
unsigned device;
};
struct cpu_driver {
struct device_operations *ops;
struct cpu_device_id *id_table;
struct acpi_cstate *cstates;
};
struct cpu_driver *find_cpu_driver(struct device *cpu);
struct thread;
struct cpu_info {
device_t cpu;
unsigned int index;
#if CONFIG_COOP_MULTITASKING
struct thread *thread;
#endif
};
static inline struct cpu_info *cpu_info(void)
{
struct cpu_info *ci;
__asm__("andl %%esp,%0; "
"orl %2, %0 "
:"=r" (ci)
: "0" (~(CONFIG_STACK_SIZE - 1)),
"r" (CONFIG_STACK_SIZE - sizeof(struct cpu_info))
);
return ci;
}
static inline unsigned long cpu_index(void)
{
struct cpu_info *ci;
ci = cpu_info();
return ci->index;
}
#else
#include <arch/io.h>
#endif
#ifndef __ROMCC__ // romcc is segfaulting in some cases
struct cpuinfo_x86 {
uint8_t x86; /* CPU family */
uint8_t x86_vendor; /* CPU vendor */
uint8_t x86_model;
uint8_t x86_mask;
};
static inline void get_fms(struct cpuinfo_x86 *c, uint32_t tfms)
{
c->x86 = (tfms >> 8) & 0xf;
c->x86_model = (tfms >> 4) & 0xf;
c->x86_mask = tfms & 0xf;
if (c->x86 == 0xf)
c->x86 += (tfms >> 20) & 0xff;
if (c->x86 >= 0x6)
c->x86_model += ((tfms >> 16) & 0xF) << 4;
}
#endif
#define asmlinkage __attribute__((regparm(0)))
#endif /* ARCH_CPU_H */