diff options
| author | Michal Idziorek <m.i@gmx.at> | 2014-07-08 17:37:43 +0200 |
|---|---|---|
| committer | Michal Idziorek <m.i@gmx.at> | 2014-07-08 17:37:43 +0200 |
| commit | a24b9f2c4856cba82e3a563676d654c5030d4fd6 (patch) | |
| tree | e9c8fca985b4d49b07c43057ef233bc1828771d3 /kernel/pic.asm | |
| parent | bf67de78c26c6f6e585f11899591f61da5a2c3d8 (diff) | |
moved pic setupt to boot/pic.asm
Diffstat (limited to 'kernel/pic.asm')
| -rw-r--r-- | kernel/pic.asm | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/kernel/pic.asm b/kernel/pic.asm deleted file mode 100644 index ecbab64..0000000 --- a/kernel/pic.asm +++ /dev/null @@ -1,67 +0,0 @@ -;************************************************************************ -; Map the 8259A PIC to use interrupts 32-47 within our interrupt table -;************************************************************************ - -%define ICW_1 0x11 ; 00010001 binary. Enables initialization mode and we are sending ICW 4 - -%define PIC_1_CTRL 0x20 ; Primary PIC control register -%define PIC_2_CTRL 0xA0 ; Secondary PIC control register - -%define PIC_1_DATA 0x21 ; Primary PIC data register -%define PIC_2_DATA 0xA1 ; Secondary PIC data register - -%define IRQ_0 0x20 ; IRQs 0-7 mapped to use interrupts 0x20-0x27 -%define IRQ_8 0x28 ; IRQs 8-15 mapped to use interrupts 0x28-0x36 - -MapPIC: - -; Send ICW 1 - Begin initialization ------------------------- - - ; Setup to initialize the primary PIC. Send ICW 1 - - mov al, ICW_1 - out PIC_1_CTRL, al - -; Send ICW 2 - Map IRQ base interrupt numbers --------------- - - ; Remember that we have 2 PICs. Because we are cascading with this second PIC, send ICW 1 to second PIC command register - - out PIC_2_CTRL, al - - ; send ICW 2 to primary PIC - - mov al, IRQ_0 - out PIC_1_DATA, al - - ; send ICW 2 to secondary controller - - mov al, IRQ_8 - out PIC_2_DATA, al - -; Send ICW 3 - Set the IR line to connect both PICs --------- - - ; Send ICW 3 to primary PIC - - mov al, 0x4 ; 0x04 => 0100, second bit (IR line 2) - out PIC_1_DATA, al ; write to data register of primary PIC - - ; Send ICW 3 to secondary PIC - - mov al, 0x2 ; 010=> IR line 2 - out PIC_2_DATA, al ; write to data register of secondary PIC - -; Send ICW 4 - Set x86 mode -------------------------------- - - mov al, 1 ; bit 0 enables 80x86 mode - - ; send ICW 4 to both primary and secondary PICs - - out PIC_1_DATA, al - out PIC_2_DATA, al - -; All done. Null out the data registers - - mov al, 0 - out PIC_1_DATA, al - out PIC_2_DATA, al - |