X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fopenbios%2Farch%2Fppc%2Fstart.S;fp=qemu%2Froms%2Fopenbios%2Farch%2Fppc%2Fstart.S;h=40ee08963e71137b4ff03e816c5cb02f2372e740;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/roms/openbios/arch/ppc/start.S b/qemu/roms/openbios/arch/ppc/start.S
new file mode 100644
index 000000000..40ee08963
--- /dev/null
+++ b/qemu/roms/openbios/arch/ppc/start.S
@@ -0,0 +1,335 @@
+/*
+ *   Creation Date: <2001/06/16 21:30:18 samuel>
+ *   Time-stamp: <2003/04/04 16:32:06 samuel>
+ *
+ *	<init.S>
+ *
+ *	Asm glue for ELF images run inside MOL
+ *
+ *   Copyright (C) 2001, 2002, 2003 Samuel Rydh (samuel@ibrium.se)
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation
+ *
+ */
+
+#include "asm/asmdefs.h"
+#include "asm/processor.h"
+#include "osi.h"
+
+/************************************************************************/
+/*	Macros								*/
+/************************************************************************/
+
+#define ILLEGAL_VECTOR( v )	.org __vectors + v ; bl trap_error ;
+#define VECTOR( v, dummystr )	.org __vectors + v ; vector__##v
+
+#define EXCEPTION_PREAMBLE \
+	mtsprg1	r1 ;		/* scratch */ \
+	mfsprg0	r1 ;		/* exception stack in sprg0 */ \
+	addi	r1,r1,-80 ;	/* push exception frame */ \
+ \
+	stw	r0,0(r1) ;	/* save r0 */ \
+	mfsprg1	r0 ; \
+	stw	r0,4(r1) ;	/* save r1 */ \
+	stw	r2,8(r1) ;	/* save r2 */ \
+	stw	r3,12(r1) ;	/* save r3 */ \
+	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) ; \
+ \
+	mflr	r0 ; \
+	stw	r0,52(r1) ; \
+	mfcr	r0 ; \
+	stw	r0,56(r1) ; \
+	mfctr	r0 ; \
+	stw	r0,60(r1) ; \
+	mfxer	r0 ; \
+	stw	r0,64(r1) ; \
+ \
+	/* 76(r1) unused */ \
+	addi	r1,r1,-16 ;	/* call conventions uses 0(r1) and 4(r1)... */
+
+
+/************************************************************************/
+/*	stack space							*/
+/************************************************************************/
+
+	.section .bss
+	.balign 32
+	.space  32*1024		// 32 K client stack
+client_stack:
+	.space	128
+
+	.space	64*1024		// 64 K stack
+stack:	.space  64
+
+	.space  32*1024		// 32 K exception stack
+estack:	.space	128
+
+
+/************************************************************************/
+/*	entry								*/
+/************************************************************************/
+
+	.text
+GLOBL(_start):
+	li	r0,0
+	mtmsr	r0
+
+	lis	r1,HA(estack)
+	addi	r1,r1,LO(estack)
+	mtsprg0 r1			// setup exception stack
+	lis	r1,HA(stack)
+	addi	r1,r1,LO(stack)
+
+	// copy exception vectors
+	lis	r3,HA(__vectors)
+	addi	r3,r3,LO(__vectors)
+	li	r4,0
+	li	r5,__vectors_end - __vectors + 16
+	rlwinm	r5,r5,0,0,28
+1:	lwz	r6,0(r3)
+	lwz	r7,4(r3)
+	lwz	r8,8(r3)
+	lwz	r9,12(r3)
+	stw	r6,0(r4)
+	stw	r7,4(r4)
+	stw	r8,8(r4)
+	stw	r9,12(r4)
+	dcbst	0,r4
+	sync
+	icbi	0,r4
+	sync
+	addi	r5,r5,-16
+	addi	r3,r3,16
+	addi	r4,r4,16
+	cmpwi	r5,0
+	bgt	1b
+	isync
+
+	bl	setup_mmu
+	bl	entry
+1:	nop
+	b	1b
+
+
+	/* According to IEEE 1275, PPC bindings:
+	 *
+	 * 	MSR = FP, ME + (DR|IR)
+	 *	r1 = stack (32 K + 32 bytes link area above)
+	 *	r5 = clint interface handler
+	 *	r6 = address of client program arguments (unused)
+	 *	r7 = length of client program arguments (unsed)
+	 */
+saved_stack:
+	.long	0
+	/* void call_elf( entry ) */
+GLOBL(call_elf):
+	mflr	r0
+	stwu	r1,-16(r1)
+	stw	r0,20(r1)
+	mtlr	r3
+	lis	r8,HA(saved_stack)
+	addi	r8,r8,LO(saved_stack)		// save our stack pointer
+	stw	r1,0(r8)
+	lis	r1,HA(client_stack)
+	addi	r1,r1,LO(client_stack)
+	lis	r5,HA(of_client_callback)
+	addi	r5,r5,LO(of_client_callback)	// r5 = callback
+	li	r6,0			// r6 = address of client program arguments (unused)
+	li	r7,0			// r7 = length of client program arguments (unused)
+	li	r0,MSR_FP | MSR_ME | MSR_DR | MSR_IR
+	mtmsr	r0
+	blrl
+
+	lis	r8,HA(saved_stack)
+	addi	r8,r8,LO(saved_stack)		// restore stack pointer
+	mr	r1,r8
+	lwz	r0,20(r1)
+	mtlr	r0
+	addi	r1,r1,16
+	// XXX: should restore r12-r31 etc..
+	// we should not really come here though
+	blr
+
+GLOBL(of_client_callback):
+	lis	r4,HA(saved_stack)
+	addi	r4,r4,LO(saved_stack)
+	lwz	r4,0(r4)
+	stwu	r4,-32(r4)
+	mflr	r5
+	stw	r5,32+4(r4)
+	stw	r1,8(r4)		// save caller stack
+	mr	r1,r4
+	stw	r2,12(r1)
+	stw	r0,16(r1)
+	mfctr	r2
+	stw	r2,20(r1)
+	mfcr	r2
+	stw	r2,24(r1)
+	mfxer	r2
+	stw	r2,28(r1)
+	// do we need to save more registers?
+	bl	of_client_interface
+	lwz	r4,32+4(r1)
+	mtlr	r4
+	lwz	r2,20(r1)
+	mtctr	r2
+	lwz	r2,24(r1)
+	mtcr	r2
+	lwz	r2,28(r1)
+	mtxer	r2
+	lwz	r2,12(r1)
+	lwz	r0,16(r1)
+	lwz	r1,8(r1)		// restore caller stack
+	blr
+
+	/* rtas glue (must be reloctable) */
+GLOBL(of_rtas_start):
+	/* r3 = argument buffer, r4 = of_rtas_start */
+	/* according to the CHRP standard, cr must be preserved (cr0/cr1 too?) */
+	mr      r6,r3
+	lis	r3,HA(OSI_SC_MAGIC_R3)
+	addi	r3,r3,LO(OSI_SC_MAGIC_R3)
+	lis	r4,HA(OSI_SC_MAGIC_R4)
+	addi	r4,r4,LO(OSI_SC_MAGIC_R4)
+	li	r5,OSI_OF_RTAS
+	sc
+	blr
+GLOBL(of_rtas_end):
+
+
+	/* used in a hack to the newworld calibration */
+GLOBL(nw_dec_calibration):
+	.long	0
+GLOBL(timer_calib_start):
+	lis	r3,HA(nw_dec_calibration)
+	addi	r3,r3,LO(nw_dec_calibration)
+	lwz	r3,0(r3)
+	blr
+GLOBL(timer_calib_end):
+
+
+/************************************************************************/
+/*	vectors								*/
+/************************************************************************/
+
+GLOBL(__vectors):
+	nop			// NULL-jmp trap
+1:	nop			//
+	b	1b
+
+exception_return:
+	addi	r1,r1,16	// pop ABI frame
+
+	lwz	r0,52(r1)
+	mtlr	r0
+	lwz	r0,56(r1)
+	mtcr	r0
+	lwz	r0,60(r1)
+	mtctr	r0
+	lwz	r0,64(r1)
+	mtxer	r0
+
+	lwz	r0,0(r1)	// restore r0
+	lwz	r2,8(r1)	// restore r2
+	lwz	r3,12(r1)	// restore r3
+	lwz	r4,16(r1)
+	lwz	r5,20(r1)
+	lwz	r6,24(r1)
+	lwz	r7,28(r1)
+	lwz	r8,32(r1)
+	lwz	r9,36(r1)
+	lwz	r10,40(r1)
+	lwz	r11,44(r1)
+	lwz	r12,48(r1)
+	lwz	r1,4(r1)	// restore r1
+	rfi
+
+trap_error:
+	mflr	r3
+	b	unexpected_excep
+
+ILLEGAL_VECTOR( 0x100 )
+ILLEGAL_VECTOR( 0x200 )
+
+VECTOR( 0x300, "DSI" ):
+	EXCEPTION_PREAMBLE
+	lis	r3,HA(dsi_exception)
+	addi	r3,r3,LO(dsi_exception)
+	mtctr	r3
+	bctrl
+	b	exception_return
+
+VECTOR( 0x400, "ISI" ):
+	EXCEPTION_PREAMBLE
+	lis	r3,HA(isi_exception)
+	addi	r3,r3,LO(isi_exception)
+	mtctr	r3
+	bctrl
+	b	exception_return
+
+	ILLEGAL_VECTOR( 0x500 )
+	ILLEGAL_VECTOR( 0x600 )
+	ILLEGAL_VECTOR( 0x700 )
+
+VECTOR( 0x800, "FPU" ):
+	mtsprg1	r3
+	mfsrr1	r3
+	ori	r3,r3,0x2000
+	mtsrr1	r3
+	mfsprg1	r3
+	rfi
+
+ILLEGAL_VECTOR( 0x900 )
+ILLEGAL_VECTOR( 0xa00 )
+ILLEGAL_VECTOR( 0xb00 )
+ILLEGAL_VECTOR( 0xc00 )
+ILLEGAL_VECTOR( 0xd00 )
+ILLEGAL_VECTOR( 0xe00 )
+ILLEGAL_VECTOR( 0xf00 )
+ILLEGAL_VECTOR( 0xf20 )
+ILLEGAL_VECTOR( 0x1000 )
+ILLEGAL_VECTOR( 0x1100 )
+ILLEGAL_VECTOR( 0x1200 )
+ILLEGAL_VECTOR( 0x1300 )
+ILLEGAL_VECTOR( 0x1400 )
+ILLEGAL_VECTOR( 0x1500 )
+ILLEGAL_VECTOR( 0x1600 )
+ILLEGAL_VECTOR( 0x1700 )
+
+GLOBL(__vectors_end):
+
+
+#define CACHE_LINE_SIZE         32
+#define LG_CACHE_LINE_SIZE      5
+
+/* flush_icache_range( unsigned long start, unsigned long stop) */
+GLOBL(flush_icache_range):
+        li      r5,CACHE_LINE_SIZE-1
+        andc    r3,r3,r5
+        subf    r4,r3,r4
+        add     r4,r4,r5
+        srwi.   r4,r4,LG_CACHE_LINE_SIZE
+        beqlr
+        mtctr   r4
+        mr      r6,r3
+1:      dcbst   0,r3
+        addi    r3,r3,CACHE_LINE_SIZE
+        bdnz    1b
+        sync                            /* wait for dcbst's to get to ram */
+        mtctr   r4
+2:      icbi    0,r6
+        addi    r6,r6,CACHE_LINE_SIZE
+        bdnz    2b
+        sync                            /* additional sync needed on g4 */
+        isync
+        blr