From 8bde7f776c77b343aca29b8c7b58464d915ac245 Mon Sep 17 00:00:00 2001 From: wdenk Date: Fri, 27 Jun 2003 21:31:46 +0000 Subject: * Code cleanup: - remove trailing white space, trailing empty lines, C++ comments, etc. - split cmd_boot.c (separate cmd_bdinfo.c and cmd_load.c) * Patches by Kenneth Johansson, 25 Jun 2003: - major rework of command structure (work done mostly by Michal Cendrowski and Joakim Kristiansen) --- cpu/i386/interrupts.c | 196 +++++++++++++++++++++++++------------------------- 1 file changed, 97 insertions(+), 99 deletions(-) (limited to 'cpu/i386/interrupts.c') diff --git a/cpu/i386/interrupts.c b/cpu/i386/interrupts.c index 614d408468..84825aea19 100644 --- a/cpu/i386/interrupts.c +++ b/cpu/i386/interrupts.c @@ -29,7 +29,6 @@ #include - struct idt_entry { u16 base_low; u16 selector; @@ -44,7 +43,7 @@ struct idt_entry idt[256]; #define MAX_IRQ 16 -typedef struct irq_handler { +typedef struct irq_handler { struct irq_handler *next; interrupt_handler_t* isr_func; void *isr_data; @@ -60,27 +59,26 @@ typedef struct { static irq_desc_t irq_table[MAX_IRQ]; - asm(".globl syscall_entry\n" \ - "syscall_entry:\n" \ - "popl %ebx\n" /* throw away the return address, flags */ \ - "popl %ebx\n" /* and segment that the INT instruction pushed */ \ - "popl %ebx\n" /* on to the stack */ \ - "movl %eax, %ecx\n" /* load the syscall nr argument*/ \ - "movl syscall_tbl, %eax\n" /* load start of syscall table */ \ - "cmpl $(11-1), %ecx\n" /* FixMe: find a way to use NR_SYSCALLS macro here */ \ - "ja bad_syscall\n" \ - "movl (%eax, %ecx, 4), %eax\n" /* load the handler of the syscall*/ \ - "test %eax, %eax\n" /* test for null */ \ - "je bad_syscall\n" \ - "popl %ecx\n" \ - "popl %ebx\n" \ - "sti \n" \ - "jmp *%eax\n" \ + "syscall_entry:\n" \ + "popl %ebx\n" /* throw away the return address, flags */ \ + "popl %ebx\n" /* and segment that the INT instruction pushed */ \ + "popl %ebx\n" /* on to the stack */ \ + "movl %eax, %ecx\n" /* load the syscall nr argument*/ \ + "movl syscall_tbl, %eax\n" /* load start of syscall table */ \ + "cmpl $(11-1), %ecx\n" /* FixMe: find a way to use NR_SYSCALLS macro here */ \ + "ja bad_syscall\n" \ + "movl (%eax, %ecx, 4), %eax\n" /* load the handler of the syscall*/ \ + "test %eax, %eax\n" /* test for null */ \ + "je bad_syscall\n" \ + "popl %ecx\n" \ + "popl %ebx\n" \ + "sti \n" \ + "jmp *%eax\n" \ "bad_syscall: movl $0xffffffff, %eax\n" \ - "popl %ecx\n" \ - "popl %ebx\n" \ - "ret"); + "popl %ecx\n" \ + "popl %ebx\n" \ + "ret"); void __attribute__ ((regparm(0))) syscall_entry(void); @@ -104,7 +102,7 @@ char exception_stack[4096]; "pusha \n" \ "pushl $"#x"\n" \ "pushl $irq_return\n" \ - "jmp do_irq\n"); \ + "jmp do_irq\n"); \ void __attribute__ ((regparm(0))) irq_##x(void) #define DECLARE_EXCEPTION(x, f) \ @@ -173,20 +171,20 @@ DECLARE_INTERRUPT(12); DECLARE_INTERRUPT(13); DECLARE_INTERRUPT(14); DECLARE_INTERRUPT(15); - -void __attribute__ ((regparm(0))) default_isr(void); + +void __attribute__ ((regparm(0))) default_isr(void); asm ("default_isr: iret\n"); -void disable_irq(int irq) +void disable_irq(int irq) { if (irq >= MAX_IRQ) { return; } irq_table[irq].status |= IRQ_DISABLED; - + } -void enable_irq(int irq) +void enable_irq(int irq) { if (irq >= MAX_IRQ) { return; @@ -198,7 +196,7 @@ void enable_irq(int irq) static void unmask_irq(int irq) { int imr_port; - + if (irq >= MAX_IRQ) { return; } @@ -207,7 +205,7 @@ static void unmask_irq(int irq) } else { imr_port = MASTER_PIC + IMR; } - + outb(inb(imr_port)&~(1<<(irq&7)), imr_port); } @@ -216,7 +214,7 @@ static void unmask_irq(int irq) static void mask_irq(int irq) { int imr_port; - + if (irq >= MAX_IRQ) { return; } @@ -225,8 +223,8 @@ static void mask_irq(int irq) } else { imr_port = MASTER_PIC + IMR; } - - outb(inb(imr_port)|(1<<(irq&7)), imr_port); + + outb(inb(imr_port)|(1<<(irq&7)), imr_port); } @@ -238,110 +236,110 @@ static void specific_eoi(int irq) if (irq > 7) { outb(OCW2_SEOI|(irq&7), SLAVE_PIC + OCW2); irq = SEOI_IR2; /* also do IR2 on master */ - } + } outb(OCW2_SEOI|irq, MASTER_PIC + OCW2); } -void __attribute__ ((regparm(0))) do_irq(int irq) +void __attribute__ ((regparm(0))) do_irq(int irq) { - + mask_irq(irq); - + if (irq_table[irq].status & IRQ_DISABLED) { unmask_irq(irq); specific_eoi(irq); return; } - - + + if (NULL != irq_table[irq].handler) { irq_handler_t *handler; - for (handler = irq_table[irq].handler; + for (handler = irq_table[irq].handler; NULL!= handler; handler = handler->next) { handler->isr_func(handler->isr_data); } } else { - if ((irq & 7) != 7) { + if ((irq & 7) != 7) { printf("Spurious irq %d\n", irq); } - } + } unmask_irq(irq); - specific_eoi(irq); + specific_eoi(irq); } -void __attribute__ ((regparm(0))) unknown_exception_entry(int cause, int ip, int seg) +void __attribute__ ((regparm(0))) unknown_exception_entry(int cause, int ip, int seg) { printf("Unknown Exception %d at %04x:%08x\n", cause, seg, ip); } -void __attribute__ ((regparm(0))) divide_exception_entry(int cause, int ip, int seg) +void __attribute__ ((regparm(0))) divide_exception_entry(int cause, int ip, int seg) { printf("Divide Error (Division by zero) at %04x:%08x\n", seg, ip); while(1); } -void __attribute__ ((regparm(0))) debug_exception_entry(int cause, int ip, int seg) +void __attribute__ ((regparm(0))) debug_exception_entry(int cause, int ip, int seg) { printf("Debug Interrupt (Single step) at %04x:%08x\n", seg, ip); } -void __attribute__ ((regparm(0))) nmi_entry(int cause, int ip, int seg) +void __attribute__ ((regparm(0))) nmi_entry(int cause, int ip, int seg) { printf("NMI Interrupt at %04x:%08x\n", seg, ip); } - -void __attribute__ ((regparm(0))) invalid_instruction_entry(int cause, int ip, int seg) + +void __attribute__ ((regparm(0))) invalid_instruction_entry(int cause, int ip, int seg) { printf("Invalid Instruction at %04x:%08x\n", seg, ip); while(1); } - -void __attribute__ ((regparm(0))) double_fault_entry(int cause, int ip, int seg) + +void __attribute__ ((regparm(0))) double_fault_entry(int cause, int ip, int seg) { printf("Double fault at %04x:%08x\n", seg, ip); while(1); } -void __attribute__ ((regparm(0))) invalid_tss_exception_entry(int cause, int ip, int seg) +void __attribute__ ((regparm(0))) invalid_tss_exception_entry(int cause, int ip, int seg) { printf("Invalid TSS at %04x:%08x\n", seg, ip); } - -void __attribute__ ((regparm(0))) seg_fault_entry(int cause, int ip, int seg) + +void __attribute__ ((regparm(0))) seg_fault_entry(int cause, int ip, int seg) { printf("Segmentation fault at %04x:%08x\n", seg, ip); while(1); } -void __attribute__ ((regparm(0))) stack_fault_entry(int cause, int ip, int seg) +void __attribute__ ((regparm(0))) stack_fault_entry(int cause, int ip, int seg) { printf("Stack fault at %04x:%08x\n", seg, ip); while(1); } -void __attribute__ ((regparm(0))) gpf_entry(int cause, int ip, int seg) +void __attribute__ ((regparm(0))) gpf_entry(int cause, int ip, int seg) { printf("General protection fault at %04x:%08x\n", seg, ip); } -void __attribute__ ((regparm(0))) page_fault_entry(int cause, int ip, int seg) +void __attribute__ ((regparm(0))) page_fault_entry(int cause, int ip, int seg) { printf("Page fault at %04x:%08x\n", seg, ip); while(1); } -void __attribute__ ((regparm(0))) fp_exception_entry(int cause, int ip, int seg) +void __attribute__ ((regparm(0))) fp_exception_entry(int cause, int ip, int seg) { printf("Floating point exception at %04x:%08x\n", seg, ip); } -void __attribute__ ((regparm(0))) alignment_check_entry(int cause, int ip, int seg) +void __attribute__ ((regparm(0))) alignment_check_entry(int cause, int ip, int seg) { printf("Alignment check at %04x:%08x\n", seg, ip); } - -void __attribute__ ((regparm(0))) machine_check_entry(int cause, int ip, int seg) + +void __attribute__ ((regparm(0))) machine_check_entry(int cause, int ip, int seg) { printf("Machine check exception at %04x:%08x\n", seg, ip); } @@ -350,31 +348,31 @@ void __attribute__ ((regparm(0))) machine_check_entry(int cause, int ip, int seg void irq_install_handler(int ino, interrupt_handler_t *func, void *pdata) { int status; - + if (ino>MAX_IRQ) { return; } - + if (NULL != irq_table[ino].handler) { return; } - + status = disable_interrupts(); irq_table[ino].handler = malloc(sizeof(irq_handler_t)); if (NULL == irq_table[ino].handler) { return; } - + memset(irq_table[ino].handler, 0, sizeof(irq_handler_t)); - + irq_table[ino].handler->isr_func = func; irq_table[ino].handler->isr_data = pdata; if (status) { enable_interrupts(); } - + unmask_irq(ino); - + return; } @@ -384,7 +382,7 @@ void irq_free_handler(int ino) if (ino>MAX_IRQ) { return; } - + status = disable_interrupts(); mask_irq(ino); if (NULL == irq_table[ino].handler) { @@ -406,33 +404,33 @@ asm ("idt_ptr:\n" static void set_vector(int intnum, void *routine) { - idt[intnum].base_high = (u16)((u32)(routine)>>16); - idt[intnum].base_low = (u16)((u32)(routine)&0xffff); + idt[intnum].base_high = (u16)((u32)(routine)>>16); + idt[intnum].base_low = (u16)((u32)(routine)&0xffff); } int interrupt_init(void) { int i; - + /* Just in case... */ disable_interrupts(); - + /* Initialize the IDT and stuff */ - - + + memset(irq_table, 0, sizeof(irq_table)); /* Setup the IDT */ - for (i=0;i<256;i++) { + for (i=0;i<256;i++) { idt[i].access = 0x8e; - idt[i].res = 0; - idt[i].selector = 0x10; + idt[i].res = 0; + idt[i].selector = 0x10; set_vector(i, default_isr); - } - + } + asm ("cs lidt idt_ptr\n"); - + /* Setup exceptions */ set_vector(0x00, exp_0); set_vector(0x01, exp_1); @@ -487,39 +485,39 @@ int interrupt_init(void) /* vectors 0x30-0x3f are reserved for irq 16-31 */ set_vector(0x40, syscall_entry); - + /* Mask all interrupts */ outb(0xff, MASTER_PIC + IMR); outb(0xff, SLAVE_PIC + IMR); - + /* Master PIC */ - outb(ICW1_SEL|ICW1_EICW4, MASTER_PIC + ICW1); + outb(ICW1_SEL|ICW1_EICW4, MASTER_PIC + ICW1); outb(0x20, MASTER_PIC + ICW2); /* Place master PIC interrupts at INT20 */ - outb(IR2, MASTER_PIC + ICW3); /* ICW3, One slevc PIC is present */ + outb(IR2, MASTER_PIC + ICW3); /* ICW3, One slevc PIC is present */ outb(ICW4_PM, MASTER_PIC + ICW4); - + for (i=0;i<8;i++) { outb(OCW2_SEOI|i, MASTER_PIC + OCW2); } - + /* Slave PIC */ - outb(ICW1_SEL|ICW1_EICW4, SLAVE_PIC + ICW1); + outb(ICW1_SEL|ICW1_EICW4, SLAVE_PIC + ICW1); outb(0x28, SLAVE_PIC + ICW2); /* Place slave PIC interrupts at INT28 */ outb(0x02, SLAVE_PIC + ICW3); /* Slave ID */ - outb(ICW4_PM, SLAVE_PIC + ICW4); - + outb(ICW4_PM, SLAVE_PIC + ICW4); + for (i=0;i<8;i++) { outb(OCW2_SEOI|i, SLAVE_PIC + OCW2); } - - + + /* enable cascade interrerupt */ outb(0xfb, MASTER_PIC + IMR); outb(0xff, SLAVE_PIC + IMR); - + /* It is now safe to enable interrupts */ - enable_interrupts(); - + enable_interrupts(); + return 0; } @@ -531,9 +529,9 @@ void enable_interrupts(void) int disable_interrupts(void) { long flags; - + asm volatile ("pushfl ; popl %0 ; cli\n" : "=g" (flags) : ); - + return (flags&0x200); /* IE flags is bit 9 */ } @@ -541,9 +539,9 @@ int disable_interrupts(void) #ifdef CFG_RESET_GENERIC void __attribute__ ((regparm(0))) generate_gpf(void); -asm(".globl generate_gpf\n" - "generate_gpf:\n" - "ljmp $0x70, $0x47114711\n"); /* segment 0x70 is an arbitrary segment which does not +asm(".globl generate_gpf\n" + "generate_gpf:\n" + "ljmp $0x70, $0x47114711\n"); /* segment 0x70 is an arbitrary segment which does not * exist */ void reset_cpu(ulong addr) { -- cgit v1.2.3