[ros-diffs] [arty] 22659: Utility functions separated, simple test (register dump)

Author: arty
Date: Tue Jun 27 12:56:20 2006
New Revision: 22659

URL: http://svn.reactos.org/svn/reactos?rev=22659&view=rev
Log:
Utility functions separated, simple test (register dump)

Added:
    branches/powerpc/reactos/boot/freeldr/bootsect/ofw_tests/
    branches/powerpc/reactos/boot/freeldr/bootsect/ofw_tests/ofwtest.s
    branches/powerpc/reactos/boot/freeldr/bootsect/ofw_util.s

Added: branches/powerpc/reactos/boot/freeldr/bootsect/ofw_tests/ofwtest.s
URL:
http://svn.reactos.org/svn/reactos/branches/powerpc/reactos/boot/freeldr/bo…
==============================================================================
--- branches/powerpc/reactos/boot/freeldr/bootsect/ofw_tests/ofwtest.s (added)
+++ branches/powerpc/reactos/boot/freeldr/bootsect/ofw_tests/ofwtest.s Tue Jun 27 12:56:20
2006
@@ -1,0 +1,187 @@
+	.section .text
+
+_start:	
+	.long	0xe00000 + 12
+	.long	0
+	.long	0
+	
+	.globl ofw_functions_addr
+	.globl ofw_dumpregs
+	
+ofw_functions_addr:
+	.long	ofw_functions
+
+	.globl _begin
+_begin:
+	sync                    
+	isync
+
+	lis     %r1,stack@ha    
+	addi    %r1,%r1,stack@l 
+	addi    %r1,%r1,16384 - 0x10
+          
+	/* Store ofw call addr */
+	mr	%r21,%r5
+	lis	%r8,_start@ha
+	addi	%r7,%r8,ofw_call_addr - _start
+	stw	%r21,0(%r7)
+
+	bl	ofw_dumpregs
+
+foo:
+	b	foo
+
+	.align	4
+call_freeldr:
+	/* Get the address of the functions list --
+	 * Note:
+	 * Because of little endian switch we must use an even number of
+	 * instructions here..  Pad with a nop if needed. */
+	mfmsr	%r10
+	ori	%r10,%r10,1
+	mtmsr	%r10
+
+	nop
+	
+	/* Note that this is little-endian from here on */
+	blr
+	nop
+
+	.align  4
+
+call_ofw:
+	/* R3 has the function offset to call (n * 4) 
+	 * Other arg registers are unchanged.
+	 * Note that these 4 instructions are in reverse order due to
+	 * little-endian convention */
+	andi.	%r0,%r0,65534
+	mfmsr	%r0
+	mtmsr	%r0
+	/* Now normal ordering resumes */
+	subi	%r1,%r1,0x100
+
+	stw	%r8,4(%r1)
+	stw	%r9,8(%r1)
+	stw	%r10,12(%r1)
+	mflr	%r8
+	stw	%r8,16(%r1)
+
+	lis	%r10,0xe00000@ha
+	add	%r9,%r3,%r10
+	lwz	%r3,ofw_functions_addr - _start@l(%r9)
+	lwz	%r3,0(%r3)
+	mtctr	%r3
+	
+	mr	%r3,%r4
+	mr	%r4,%r5
+	mr	%r5,%r6
+	mr	%r6,%r7
+	mr	%r7,%r8
+
+	/* Goto the swapped function */
+	bctrl
+
+	lwz	%r8,16(%r1)
+	mtlr	%r8
+
+	lwz	%r8,4(%r1)
+	lwz	%r9,8(%r1)
+	lwz	%r10,12(%r1)
+
+	addi	%r1,%r1,0x100
+	/* Ok, go back to little endian */
+	mfmsr	%r0
+	ori	%r0,%r0,1
+	mtmsr	%r0
+
+	/* Note that this is little-endian from here on */
+	blr
+	nop
+
+zero_registers:
+	xor	%r2,%r2,%r2
+	mr	%r0,%r2
+	mr	%r3,%r2
+	
+	mr	%r4,%r2
+	mr	%r5,%r2
+	mr	%r6,%r2
+	mr	%r7,%r2
+
+	mr	%r8,%r2
+	mr	%r9,%r2
+	mr	%r10,%r2
+	mr	%r11,%r2
+
+	mr	%r12,%r2
+	mr	%r13,%r2
+	mr	%r14,%r2
+	mr	%r15,%r2
+	
+	mr	%r12,%r2
+	mr	%r13,%r2
+	mr	%r14,%r2
+	mr	%r15,%r2
+	
+	mr	%r16,%r2
+	mr	%r17,%r2
+	mr	%r18,%r2
+	mr	%r19,%r2
+	
+	mr	%r20,%r2
+	mr	%r21,%r2
+	mr	%r22,%r2
+	mr	%r23,%r2
+	
+	mr	%r24,%r2
+	mr	%r25,%r2
+	mr	%r26,%r2
+	mr	%r27,%r2
+	
+	mr	%r28,%r2
+	mr	%r29,%r2
+	mr	%r30,%r2
+	mr	%r31,%r2
+
+	blr
+	
+	.org	0x1000
+freeldr_banner:
+	.ascii	"ReactOS OpenFirmware Boot Program\r\n\0"
+
+freeldr_halt:
+	.ascii	"ReactOS OpenFirmware Boot Program Halting\r\n\0"
+
+freeldr_reg_init:
+	.ascii	"r\0"
+freeldr_reg_lr:	
+	.ascii	"lr \0"
+freeldr_reg_cr:	
+	.ascii	"cr \0"
+freeldr_reg_ctr:	
+	.ascii	"ctr\0"
+freeldr_reg_msr:	
+	.ascii	"msr\0"
+			
+ofw_memory_size:
+	.long	0
+	.long	0
+	.long	0
+	.long	0
+	
+ofw_chosen_name:
+	.ascii	"/chosen\0"
+
+ofw_stdout_name:
+	.ascii	"stdout\0"
+
+ofw_memory_name:
+	.ascii	"/memory@0\0"
+
+ofw_reg_name:
+	.ascii	"reg\0"
+	
+	.org	0x2000
+stack:
+	.space	0x4000
+

Added: branches/powerpc/reactos/boot/freeldr/bootsect/ofw_util.s
URL:
http://svn.reactos.org/svn/reactos/branches/powerpc/reactos/boot/freeldr/bo…
==============================================================================
--- branches/powerpc/reactos/boot/freeldr/bootsect/ofw_util.s (added)
+++ branches/powerpc/reactos/boot/freeldr/bootsect/ofw_util.s Tue Jun 27 12:56:20 2006
@@ -1,0 +1,368 @@
+	.section .text
+prim_strlen:
+	mr	%r5,%r3
+prim_strlen_loop:	
+	lbz	%r4,0(%r3)
+	cmpi	0,0,%r4,0
+	beq	prim_strlen_done
+	addi	%r3,%r3,1
+	b	prim_strlen_loop
+	
+prim_strlen_done:
+	sub	%r3,%r3,%r5
+	blr
+	
+copy_bits:
+	cmp	0,0,%r3,%r4
+	beqlr
+
+	lwz	%r6,0(%r3)
+	stw	%r6,0(%r5)
+	addi	%r3,%r3,4
+	addi	%r5,%r5,4
+	b	copy_bits
+
+ofw_print_string:
+	/* Reserve some stack space */
+	subi	%r1,%r1,32
+
+	/* Save args */
+	stw	%r3,0(%r1)
+	
+	/* Save the lr, a scratch register */
+	stw	%r8,8(%r1)
+	mflr	%r8
+	stw	%r8,12(%r1)
+
+	/* Load the package name */
+	lis	%r3,0xe00000@ha
+	addi	%r3,%r3,ofw_chosen_name - _start
+
+	/* Fire */
+	bl	ofw_finddevice
+
+	/* Load up for getprop */
+	stw	%r3,16(%r1)
+
+	lis	%r4,0xe00000@ha
+	addi	%r4,%r4,ofw_stdout_name - _start
+
+	addi	%r5,%r1,20
+
+	li	%r6,4
+
+	bl	ofw_getprop
+
+	/* Measure the string and remember the length */
+	lwz	%r3,0(%r1)
+	bl	prim_strlen
+	mr	%r5,%r3
+	
+	lwz	%r3,20(%r1)
+	lwz	%r4,0(%r1)
+
+	/* Write the string */
+	bl	ofw_write
+
+	/* Return */
+	lwz	%r8,12(%r1)
+	mtlr	%r8
+	lwz	%r8,8(%r1)
+	
+	addi	%r1,%r1,32
+	blr
+
+	/* Print 8 hex digits representing a number in r3 */
+ofw_print_number:
+	subi	%r1,%r1,32
+	stw	%r8,0(%r1)
+	mflr	%r8
+	stw	%r8,4(%r1)
+	stw	%r9,8(%r1)
+
+	xor	%r9,%r9,%r9
+	stw	%r9,12(%r1)
+
+	/* Set up and, devide, shift */
+	mr	%r8,%r3
+	lis	%r6,0xf0000000@ha
+	lis	%r7,0x10000000@ha
+	li	%r9,8
+
+ofw_number_loop:
+	nop
+	cmpi	0,0,%r9,0
+	beq	ofw_number_return
+	subi	%r9,%r9,1
+
+	/* Body: isolate digit, divide, print */
+	and	%r5,%r6,%r8
+	divwu	%r4,%r5,%r7
+	srwi	%r6,%r6,4
+	srwi	%r7,%r7,4
+
+	nop
+	
+	cmpi	0,0,%r4,10
+	bge	ofw_number_letter
+	addi	%r4,%r4,'0'
+	b	ofw_number_digit_out
+	
+ofw_number_letter:
+	addi	%r4,%r4,'A' - 10
+
+ofw_number_digit_out:	
+	stb	%r4,12(%r1)
+	addi	%r3,%r1,12
+
+	stw	%r6,16(%r1)
+	stw	%r7,20(%r1)
+	stw	%r8,24(%r1)
+	stw	%r9,28(%r1)
+	
+	bl	ofw_print_string
+
+	lwz	%r6,16(%r1)
+	lwz	%r7,20(%r1)
+	lwz	%r8,24(%r1)
+	lwz	%r9,28(%r1)
+	
+	b	ofw_number_loop
+
+ofw_number_return:	
+	/* Return */
+	lwz	%r9,8(%r1)
+	lwz	%r8,4(%r1)
+	mtlr	%r8
+	lwz	%r8,0(%r1)
+	addi	%r1,%r1,32
+	blr
+
+ofw_print_eol:
+	subi	%r1,%r1,16
+	stw	%r8,0(%r1)
+	mflr	%r8
+	stw	%r8,4(%r1)
+	li	%r4,0x0d0a
+	sth	%r4,8(%r1)
+	xor	%r4,%r4,%r4
+	sth	%r4,10(%r1)
+	addi	%r3,%r1,8
+	bl	ofw_print_string
+	lwz	%r8,4(%r1)
+	mtlr	%r8
+	lwz	%r8,0(%r1)
+	addi	%r1,%r1,16
+	blr
+
+ofw_print_nothing:
+	subi	%r1,%r1,16
+	stw	%r8,0(%r1)
+	mflr	%r8
+	stw	%r8,4(%r1)
+	li	%r4,0
+	sth	%r4,8(%r1)
+	xor	%r4,%r4,%r4
+	sth	%r4,10(%r1)
+	addi	%r3,%r1,8
+	bl	ofw_print_string
+	lwz	%r8,4(%r1)
+	mtlr	%r8
+	lwz	%r8,0(%r1)
+	addi	%r1,%r1,16
+	blr
+
+ofw_print_space:
+	subi	%r1,%r1,16
+	stw	%r8,0(%r1)
+	mflr	%r8
+	stw	%r8,4(%r1)
+	li	%r4,0x2000
+	sth	%r4,8(%r1)
+	xor	%r4,%r4,%r4
+	sth	%r4,10(%r1)
+	addi	%r3,%r1,8
+	bl	ofw_print_string
+	lwz	%r8,4(%r1)
+	mtlr	%r8
+	lwz	%r8,0(%r1)
+	addi	%r1,%r1,16
+	blr
+
+ofw_dumpregs:	
+	/* Construct ofw exit call */
+	subi	%r1,%r1,0xa0
+
+	stw	%r0,0(%r1)
+	stw	%r1,4(%r1)
+	stw	%r2,8(%r1)
+	stw	%r3,12(%r1)
+
+	stw	%r4,16(%r1)
+	stw	%r5,20(%r1)
+	stw	%r6,24(%r1)
+	stw	%r7,28(%r1)
+	
+	stw	%r8,32(%r1)
+	stw	%r9,36(%r1)
+	stw	%r10,40(%r1)
+	stw	%r11,44(%r1)
+	
+	stw	%r12,48(%r1)
+	stw	%r13,52(%r1)
+	stw	%r14,56(%r1)
+	stw	%r15,60(%r1)
+	
+	stw	%r16,64(%r1)
+	stw	%r17,68(%r1)
+	stw	%r18,72(%r1)
+	stw	%r19,76(%r1)
+	
+	stw	%r20,80(%r1)
+	stw	%r21,84(%r1)
+	stw	%r22,88(%r1)
+	stw	%r23,92(%r1)
+	
+	stw	%r24,96(%r1)
+	stw	%r25,100(%r1)
+	stw	%r26,104(%r1)
+	stw	%r27,108(%r1)
+	
+	stw	%r28,112(%r1)
+	stw	%r29,116(%r1)
+	stw	%r30,120(%r1)
+	stw	%r31,124(%r1)
+
+	mflr	%r0
+	stw	%r0,128(%r1)
+	mfcr	%r0
+	stw	%r0,132(%r1)
+	mfctr	%r0
+	stw	%r0,136(%r1)
+	mfmsr	%r0
+	stw	%r0,140(%r1)
+
+	/* Count at zero */
+	xor	%r0,%r0,%r0
+	stw	%r0,144(%r1)
+	mr	%r3,%r1
+	stw	%r3,148(%r1)
+	
+	/* Body, print the regname, then the register */
+ofw_register_loop:
+	lwz	%r3,144(%r1)
+	cmpi	0,0,%r3,32
+	beq	ofw_register_special
+	lis	%r3,0xe00000@ha
+	addi	%r3,%r3,freeldr_reg_init - _start
+	bl	ofw_print_string
+	lwz	%r3,144(%r1)
+	bl	ofw_print_number
+	bl	ofw_print_space
+	lwz	%r3,144(%r1)
+	mulli	%r3,%r3,4
+	add	%r3,%r1,%r3
+	lwz	%r3,0(%r3)
+	stw	%r3,152(%r1)
+	bl	ofw_print_number
+	lwz	%r3,144(%r1)
+	addi	%r3,%r3,1
+	stw	%r3,144(%r1)
+
+	bl	ofw_print_space
+	
+	lis	%r3,0xe00000@ha
+	addi	%r3,%r3,freeldr_reg_init - _start
+	bl	ofw_print_string
+	lwz	%r3,144(%r1)
+	bl	ofw_print_number
+	bl	ofw_print_space
+	lwz	%r3,144(%r1)
+	mulli	%r3,%r3,4
+	add	%r3,%r1,%r3
+	lwz	%r3,0(%r3)
+	stw	%r3,152(%r1)
+	bl	ofw_print_number
+	lwz	%r3,144(%r1)
+	addi	%r3,%r3,1
+	stw	%r3,144(%r1)
+
+	b	done_dump
+
+dump_optional:	
+	bl	ofw_print_space
+	bl	ofw_print_space
+	lwz	%r3,152(%r1)
+	lwz	%r3,0(%r3)
+	bl	ofw_print_number
+	bl	ofw_print_space	
+	lwz	%r3,152(%r1)
+	lwz	%r3,4(%r3)
+	bl	ofw_print_number
+	bl	ofw_print_space	
+	lwz	%r3,152(%r1)
+	lwz	%r3,8(%r3)
+	bl	ofw_print_number
+	bl	ofw_print_space	
+	lwz	%r3,152(%r1)
+	lwz	%r3,12(%r3)
+	bl	ofw_print_number
+	bl	ofw_print_space
+done_dump:	
+	bl	ofw_print_eol
+	b	ofw_register_loop
+
+ofw_register_special:
+	/* LR */
+	lis	%r3,0xe00000@ha
+	addi	%r3,%r3,freeldr_reg_lr - _start
+	bl	ofw_print_string
+	bl	ofw_print_space
+	lwz	%r3,128(%r1)
+	bl	ofw_print_number
+	bl	ofw_print_eol
+	
+	/* CR */
+	lis	%r3,0xe00000@ha
+	addi	%r3,%r3,freeldr_reg_cr - _start
+	bl	ofw_print_string
+	bl	ofw_print_space
+	lwz	%r3,132(%r1)
+	bl	ofw_print_number
+	bl	ofw_print_eol
+	
+	/* CTR */
+	lis	%r3,0xe00000@ha
+	addi	%r3,%r3,freeldr_reg_ctr - _start
+	bl	ofw_print_string
+	bl	ofw_print_space
+	lwz	%r3,136(%r1)
+	bl	ofw_print_number
+	bl	ofw_print_eol
+	
+	/* MSR */
+	lis	%r3,0xe00000@ha
+	addi	%r3,%r3,freeldr_reg_msr - _start
+	bl	ofw_print_string
+	bl	ofw_print_space
+	lwz	%r3,140(%r1)
+	bl	ofw_print_number
+	bl	ofw_print_eol
+
+	/* Return */
+	lwz	%r0,128(%r1)
+	mtlr	%r0
+	
+	lwz	%r0,0(%r1)
+	lwz	%r2,8(%r1)
+	lwz	%r3,12(%r1)
+
+	lwz	%r4,16(%r1)
+	lwz	%r5,20(%r1)
+	lwz	%r6,24(%r1)
+	lwz	%r7,28(%r1)
+
+	addi	%r1,%r1,0xa0
+		
+	blr
+