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Completes port of interrpt handling logic

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3340 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2011-03-05 19:28:59 +00:00
parent 758b944c8a
commit 4f890aed78
18 changed files with 934 additions and 135 deletions
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arch/x86/include/i486/arch.h
+31 -2
View File
@@ -85,7 +85,7 @@
* Public Types
****************************************************************************/
/* GDT data structures
/* GDT data structures ******************************************************
*
* The Global Descriptor Table or GDT is a data structure used by Intel x86-
* family processors starting with the 80286 in order to define the
@@ -114,7 +114,33 @@ struct gdt_entry_s
struct gdt_ptr_s
{
uint16_t limit; /* The upper 16 bits of all selector limits */
uint32_t base; /* The address of the first gdt_entry_t struct */
uint32_t base; /* The address of the first GDT entry */
} __attribute__((packed));
/* IDT data structures ******************************************************
*
* The Interrupt Descriptor Table (IDT) is a data structure used by the x86
* architecture to implement an interrupt vector table. The IDT is used by the
* processor to determine the correct response to interrupts and exceptions.
*/
struct idt_entry_s
{
uint16_t lobase; /* Lower 16-bits of vector address for interrupt */
uint16_t sel; /* Kernel segment selector */
uint8_t zero; /* This must always be zero */
uint8_t flags; /* (See documentation) */
uint16_t hibase; /* Upper 16-bits of vector address for interrupt */
} __attribute__((packed));
/* A struct describing a pointer to an array of interrupt handlers. This is
* in a format suitable for giving to 'lidt'.
*/
struct idt_ptr_s
{
uint16_t limit;
uint32_t base; /* The address of the first GDT entry */
} __attribute__((packed));
/****************************************************************************
@@ -156,6 +182,9 @@ extern "C" {
#define EXTERN extern
#endif
EXTERN void gdt_flush(uint32_t gdt_addr);
EXTERN void idt_flush(uint32_t idt_addr);
#undef EXTERN
#ifdef __cplusplus
}
arch/x86/include/i486/irq.h
+26 -23
View File
@@ -54,28 +54,29 @@
* Definitions
****************************************************************************/
/* Storage order: %ebx, $esi, %edi, %ebp, sp, and return PC */
/* Common register save structgure created by up_saveusercontext() and by
* ISR/IRQ interrupt processing.
*/
#ifdef __ASSEMBLY__
# define REG_EBX (0*4)
# define REG_ESI (1*4)
# define REG_EDI (2*4)
# define REG_EBP (3*4)
# define REG_SP (4*4)
# define REG_PC (5*4)
# define REG_FLAGS (6*4)
#else
# define REG_EBX (0)
# define REG_ESI (1)
# define REG_EDI (2)
# define REG_EBP (3)
# define REG_SP (4)
# define REG_PC (5)
# define REG_FLAGS (6)
#endif /* __ASSEMBLY__ */
#define REG_DS (0) /* Data segment selector */
#define REG_EDI (1) /* Saved by pusha */
#define REG_ESI (2) /* " " "" " " */
#define REG_EBP (3) /* " " "" " " */
#define REG_ESP (4) /* " " "" " " */
#define REG_EBX (5) /* " " "" " " */
#define REG_EDX (6) /* " " "" " " */
#define REG_ECX (7) /* " " "" " " */
#define REG_EAX (8) /* " " "" " " */
#define REG_IRQNO (9) /* Interrupt number */
#define REG_ERRCODE (10) /* Error code */
#define REG_EIP (11) /* Pushed by process on interrupt processing */
#define REG_CS (12) /* " " "" " " "" " " " " */
#define REG_EFLAGS (13) /* " " "" " " "" " " " " */
#define REG_SP (14) /* " " "" " " "" " " " " */
#define REG_SS (15) /* " " "" " " "" " " " " */
#define XCPTCONTEXT_REGS (7)
#define XCPTCONTEXT_SIZE (4 * XCPTCONTEXT_REGS)
#define XCPTCONTEXT_REGS (16)
#define XCPTCONTEXT_SIZE (4 * XCPTCONTEXT_REGS)
/****************************************************************************
* Public Types
@@ -93,10 +94,12 @@ struct xcptcontext
#ifndef CONFIG_DISABLE_SIGNALS
void *sigdeliver; /* Actual type is sig_deliver_t */
/* These are saved copies of LR and CPSR used during signal processing. */
/* These are saved copies of instruction pointer and EFLAGS used during
* signal processing.
*/
uint32_t saved_pc;
uint32_t saved_flags;
uint32_t saved_eip;
uint32_t saved_eflags;
#endif
/* Register save area */