diff options
Diffstat (limited to 'qemu/roms/SLOF/board-qemu/llfw/startup.S')
| -rw-r--r-- | qemu/roms/SLOF/board-qemu/llfw/startup.S | 240 |
1 files changed, 0 insertions, 240 deletions
diff --git a/qemu/roms/SLOF/board-qemu/llfw/startup.S b/qemu/roms/SLOF/board-qemu/llfw/startup.S deleted file mode 100644 index bbd3ce3ac..000000000 --- a/qemu/roms/SLOF/board-qemu/llfw/startup.S +++ /dev/null @@ -1,240 +0,0 @@ -/****************************************************************************** - * Copyright (c) 2004, 2011 IBM Corporation - * All rights reserved. - * This program and the accompanying materials - * are made available under the terms of the BSD License - * which accompanies this distribution, and is available at - * http://www.opensource.org/licenses/bsd-license.php - * - * Contributors: - * IBM Corporation - initial implementation - *****************************************************************************/ - -/* SLOF for QEMU -- boot code. - * Initial entry point - */ - -#include <xvect.h> -#include <cpu.h> -#include <macros.h> - - /* qemu entry: - * - * __start loaded at 0x100 - * - * CPU 0 starts at 0 with GPR3 pointing to the flat devtree - * - * All other CPUs are held in stopped state by qemu and are - * started via RTAS - */ - .text - .globl __start -__start: - b _start - .long 0xDEADBEE0 - .long 0x0 /* size */ - .long 0x0 /* crc */ - .long relTag - __start - - /* Some exception vectors - * - * FIXME: Also need 0280, 0380, 0f20, etc. - */ - - .irp i, 0x0100,0x0180,0x0200,0x0280,0x0300,0x0380,0x0400,0x0500, \ - 0x0600,0x0700,0x0800,0x0900,0x0a00,0x0b00,0x0c00,0x0d00, \ - 0x0e00,0x0f00,0x1000,0x1100,0x1200,0x1300,0x1400,0x1500, \ - 0x1600,0x1700, \ - 0x1800,0x1900,0x1a00,0x1b00,0x1c00,0x1d00,0x1e00,0x1f00, \ - 0x2000,0x2100,0x2200,0x2300,0x2400,0x2500,0x2600,0x2700, \ - 0x2800,0x2900,0x2a00,0x2b00,0x2c00,0x2d00,0x2e00 - . = \i - - /* enable this if you get exceptions before the console works */ - /* this will allow using the hardware debugger to see where */ - /* it traps, and with what register values etc. */ - // b $ - - mtsprg 0,r0 - mfctr r0 - mtsprg 2,r0 - mflr r0 -// 10 - mtsprg 3,r0 - ld r0, (\i + 0x60)(0) - mtctr r0 - li r0, \i + 0x100 -// 20 - bctr - - . = \i + 0x60 - .quad intHandler2C - .endr - - . = XVECT_M_HANDLER - 0x100 - .quad 0x00 - .text - - /* Here's the startup code for the master CPU */ - .org 0x4000 - 0x100 -_start: - /* Save device-tree pointer */ - mr r31,r3 - - /* Switch to 64-bit mode with 64-bit exceptions */ -#define MSR_SF_LG 63 /* Enable 64 bit mode */ -#define MSR_ISF_LG 61 /* Interrupt 64b mode valid on 630 */ -#define __MASK(X) (1<<(X)) -#define MSR_SF __MASK(MSR_SF_LG) /* Enable 64 bit mode */ -#define MSR_ISF __MASK(MSR_ISF_LG) /* Interrupt 64b mode */ - mfmsr r11 /* grab the current MSR */ - li r12,(MSR_SF | MSR_ISF)@highest - sldi r12,r12,48 - or r11,r11,r12 - mtmsrd r11 - isync - - /* Early greet */ - li r3,10 - bl putc - li r3,13 - bl putc - li r3,10 - bl putc - li r3,'S' - bl putc - - li r3,'L' - bl putc - li r3,'O' - bl putc - li r3,'F' - bl putc - - bl print_version - - /* go! */ - li r3,__startC@l - mtctr r3 - bctrl - - /* write a character to the HV console */ -putc: sldi r6,r3,(24+32) - li r3,0x58 - li r4,0 - li r5,1 - .long 0x44000022 - blr - -relTag: - .ascii RELEASE - .ascii "\0" - .align 2 - -C_ENTRY(proceedInterrupt) - - ld r3,exception_stack_frame@got(r2) - ld r1,0(r3) - - .irp i, 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, \ - 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, \ - 27, 28, 29, 30, 31 - ld r\i, 0x30+\i*8 (r1) - .endr - - ld r14,0x138(r1); - mtsrr0 r14 - - ld r14,0x140(r1); - mtsrr1 r14 - - ld r14,0x148(r1); - mtcr r14 - - ld 0,XVECT_M_HANDLER(0) - mtctr 0 - - ld r0,0x30(r1); # restore vector number - ld r1,0x38(r1); - - bctr - -intHandler2C: - mtctr r1 # save old stack pointer - lis r1,0x4 - stdu r1, -0x160(r1) - .irp i, 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, \ - 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, \ - 27, 28, 29, 30, 31 - std r\i, 0x30+\i*8 (r1) - .endr - - std r0,0x30(r1); # save vector number - - mfctr r14 - std r14,0x38(r1); # save old r1 - - mfsrr0 r14 - std r14,0x138(r1); - - mfsrr1 r14 - std r14,0x140(r1); - - mfcr r14 - std r14,0x148(r1); - - mfxer r14 - std r14,0x150(r1); - - bl toc_init - - ld r3,exception_stack_frame@got(r2) - std r1,0(r3) - - - mr r3,r0 - bl .c_interrupt - - ld r14,0x138(r1); - mtsrr0 r14 - - ld r14,0x140(r1); - mtsrr1 r14 - - ld r14,0x148(r1); - mtcr r14 - - ld r14,0x150(r1); - mtxer r14 - - - .irp i, 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, \ - 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, \ - 27, 28, 29, 30, 31 - ld r\i, 0x30+\i*8 (r1) - .endr - - ld r1,0x38(r1); - - mfsprg r0,2 - mtctr r0 - mfsprg r0,3 - mtlr r0 - mfsprg r0,0 - rfid - -/* Set exception handler for given exception vector. - r3: exception vector offset - r4: exception handler -*/ - .globl .set_exception -.set_exception: - .globl set_exception -set_exception: - ld r4,0x0(r4) - .globl .set_exception_asm -.set_exception_asm: - .globl set_exception_asm -set_exception_asm: - std r4, 0x60(r3) # fixme diff 1f - 0b - blr |