Date: Wed, 18 May 2011 14:55:16 +0000 (UTC) From: Nathan Whitehorn <nwhitehorn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r222057 - in projects/pseries: conf powerpc/aim powerpc/ofw Message-ID: <201105181455.p4IEtGYw096331@svn.freebsd.org>
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Author: nwhitehorn Date: Wed May 18 14:55:16 2011 New Revision: 222057 URL: http://svn.freebsd.org/changeset/base/222057 Log: Rearrange the OF 32-bit call thunk for ppc64 to be in its own file instead of aim/locore64.S and make an equivalent thunk for 32-bit platforms to handle real mode. Add in similar stubs (untested) for RTAS calls and fix the SLOF memory hack in ofw_machdep.c to not break Apple machines with physical memory lists that are not in order. This rearranges a bunch of OF-related stuff, but still boots on: - POWER7 LPAR - IBM Cell simulator - iBook G4 - Powermac G3 - Xserve G5 Added: projects/pseries/powerpc/ofw/ofwcall32.S projects/pseries/powerpc/ofw/ofwcall64.S projects/pseries/powerpc/ofw/ofwmagic.S - copied unchanged from r221988, projects/pseries/powerpc/aim/ofwmagic.S Deleted: projects/pseries/powerpc/aim/ofwmagic.S Modified: projects/pseries/conf/files.powerpc projects/pseries/powerpc/aim/locore32.S projects/pseries/powerpc/aim/locore64.S projects/pseries/powerpc/ofw/ofw_machdep.c Modified: projects/pseries/conf/files.powerpc ============================================================================== --- projects/pseries/conf/files.powerpc Wed May 18 14:02:33 2011 (r222056) +++ projects/pseries/conf/files.powerpc Wed May 18 14:55:16 2011 (r222057) @@ -86,7 +86,6 @@ powerpc/aim/moea64_if.m optional aim powerpc/aim/moea64_native.c optional aim powerpc/aim/mp_cpudep.c optional aim smp powerpc/aim/nexus.c optional aim -powerpc/aim/ofwmagic.S optional aim powerpc/aim/slb.c optional aim powerpc64 powerpc/aim/swtch32.S optional aim powerpc powerpc/aim/swtch64.S optional aim powerpc64 @@ -136,6 +135,9 @@ powerpc/ofw/ofw_pcibus.c optional pci ai powerpc/ofw/ofw_pcib_pci.c optional pci aim powerpc/ofw/ofw_real.c optional aim powerpc/ofw/ofw_syscons.c optional sc aim +powerpc/ofw/ofwcall32.S optional aim powerpc +powerpc/ofw/ofwcall64.S optional aim powerpc64 +powerpc/ofw/ofwmagic.S optional aim powerpc/powermac/ata_kauai.c optional powermac ata | powermac atamacio powerpc/powermac/ata_macio.c optional powermac ata | powermac atamacio powerpc/powermac/ata_dbdma.c optional powermac ata | powermac atamacio Modified: projects/pseries/powerpc/aim/locore32.S ============================================================================== --- projects/pseries/powerpc/aim/locore32.S Wed May 18 14:02:33 2011 (r222056) +++ projects/pseries/powerpc/aim/locore32.S Wed May 18 14:55:16 2011 (r222057) @@ -87,9 +87,6 @@ GLOBAL(tmpstk) GLOBAL(esym) .long 0 /* end of symbol table */ -GLOBAL(ofmsr) - .long 0, 0, 0, 0, 0 /* msr/sprg0-3 used in Open Firmware */ - #define INTRCNT_COUNT 256 /* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */ GLOBAL(intrnames) .space INTRCNT_COUNT * (MAXCOMLEN + 1) * 2 @@ -99,16 +96,6 @@ GLOBAL(intrcnt) .space INTRCNT_COUNT * 4 * 2 GLOBAL(eintrcnt) -/* - * File-scope for locore.S - */ -idle_u: - .long 0 /* fake uarea during idle after exit */ -openfirmware_entry: - .long 0 /* Open Firmware entry point */ -srsave: - .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 - .text .globl btext btext: Modified: projects/pseries/powerpc/aim/locore64.S ============================================================================== --- projects/pseries/powerpc/aim/locore64.S Wed May 18 14:02:33 2011 (r222056) +++ projects/pseries/powerpc/aim/locore64.S Wed May 18 14:55:16 2011 (r222057) @@ -76,7 +76,6 @@ .set kernbase, KERNBASE #define TMPSTKSZ 8192 /* 8K temporary stack */ -#define OFWSTKSZ 4096 /* 4K Open Firmware stack */ /* * Globals @@ -85,14 +84,9 @@ .align 4 GLOBAL(tmpstk) .space TMPSTKSZ -GLOBAL(ofwstk) - .space OFWSTKSZ GLOBAL(esym) .llong 0 /* end of symbol table */ -GLOBAL(ofmsr) - .llong 0, 0, 0, 0, 0 /* msr/sprg0-3 used in Open Firmware */ - #define INTRCNT_COUNT 256 /* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */ GLOBAL(intrnames) .space INTRCNT_COUNT * (MAXCOMLEN + 1) * 2 @@ -102,16 +96,6 @@ GLOBAL(intrcnt) .space INTRCNT_COUNT * 4 * 2 GLOBAL(eintrcnt) -/* - * File-scope for locore.S - */ -idle_u: - .llong 0 /* fake uarea during idle after exit */ -openfirmware_entry: - .llong 0 /* Open Firmware entry point */ -srsave: - .llong 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 - .text .globl btext btext: @@ -208,122 +192,6 @@ tocbase: .llong .TOC.@tocbase /* - * Open Firmware Real-mode Entry Point. This is a huge pain. - */ - -ASENTRY(ofw_32bit_mode_entry) - mflr %r0 - std %r0,16(%r1) - stdu %r1,-208(%r1) - - /* - * We need to save the following, because OF's register save/ - * restore code assumes that the contents of registers are - * at most 32 bits wide: lr, cr, r2, r13-r31, the old MSR. These - * get placed in that order in the stack. - */ - - mfcr %r4 - std %r4,48(%r1) - std %r13,56(%r1) - std %r14,64(%r1) - std %r15,72(%r1) - std %r16,80(%r1) - std %r17,88(%r1) - std %r18,96(%r1) - std %r19,104(%r1) - std %r20,112(%r1) - std %r21,120(%r1) - std %r22,128(%r1) - std %r23,136(%r1) - std %r24,144(%r1) - std %r25,152(%r1) - std %r26,160(%r1) - std %r27,168(%r1) - std %r28,176(%r1) - std %r29,184(%r1) - std %r30,192(%r1) - std %r31,200(%r1) - - /* Record the old MSR */ - mfmsr %r6 - - /* read client interface handler */ - lis %r4,openfirmware_entry@ha - ld %r4,openfirmware_entry@l(%r4) - - /* - * Set the MSR to the OF value. This has the side effect of disabling - * exceptions, which is important for the next few steps. - */ - - lis %r5,ofmsr@ha - ld %r5,ofmsr@l(%r5) - mtmsrd %r5 - isync - - /* - * Set up OF stack. This needs to be accessible in real mode and - * use the 32-bit ABI stack frame format. The pointer to the current - * kernel stack is placed at the very top of the stack along with - * the old MSR so we can get them back later. - */ - mr %r5,%r1 - lis %r1,(ofwstk+OFWSTKSZ-32)@ha - addi %r1,%r1,(ofwstk+OFWSTKSZ-32)@l - std %r5,8(%r1) /* Save real stack pointer */ - std %r2,16(%r1) /* Save old TOC */ - std %r6,24(%r1) /* Save old MSR */ - li %r5,0 - stw %r5,4(%r1) - stw %r5,0(%r1) - - /* Finally, branch to OF */ - mtctr %r4 - bctrl - - /* Reload stack pointer and MSR from the OFW stack */ - ld %r6,24(%r1) - ld %r2,16(%r1) - ld %r1,8(%r1) - - /* Now set the real MSR */ - mtmsrd %r6 - isync - - /* Sign-extend the return value from OF */ - extsw %r3,%r3 - - /* Restore all the non-volatile registers */ - ld %r5,48(%r1) - mtcr %r5 - ld %r13,56(%r1) - ld %r14,64(%r1) - ld %r15,72(%r1) - ld %r16,80(%r1) - ld %r17,88(%r1) - ld %r18,96(%r1) - ld %r19,104(%r1) - ld %r20,112(%r1) - ld %r21,120(%r1) - ld %r22,128(%r1) - ld %r23,136(%r1) - ld %r24,144(%r1) - ld %r25,152(%r1) - ld %r26,160(%r1) - ld %r27,168(%r1) - ld %r28,176(%r1) - ld %r29,184(%r1) - ld %r30,192(%r1) - ld %r31,200(%r1) - - /* Restore the stack and link register */ - ld %r1,0(%r1) - ld %r0,16(%r1) - mtlr %r0 - blr - -/* * int setfault() * * Similar to setjmp to setup for handling faults on accesses to user memory. Modified: projects/pseries/powerpc/ofw/ofw_machdep.c ============================================================================== --- projects/pseries/powerpc/ofw/ofw_machdep.c Wed May 18 14:02:33 2011 (r222056) +++ projects/pseries/powerpc/ofw/ofw_machdep.c Wed May 18 14:55:16 2011 (r222057) @@ -65,11 +65,12 @@ static struct mem_region OFmem[OFMEM_REG static struct mem_region OFfree[OFMEM_REGIONS + 3]; extern register_t ofmsr[5]; -static int (*ofwcall)(void *); +extern void *openfirmware_entry; static void *fdt; int ofw_real_mode; -int ofw_32bit_mode_entry(void *); +int ofwcall(void *); +int rtascall(void *); static void ofw_quiesce(void); static int openfirmware(void *args); @@ -254,6 +255,7 @@ ofw_mem_regions(struct mem_region **memp struct mem_region **availp, int *availsz) { phandle_t phandle; + vm_offset_t maxphysaddr; int asz, msz, fsz; int i, j; int still_merging; @@ -281,10 +283,14 @@ ofw_mem_regions(struct mem_region **memp * available segment past the end of physical memory, so truncate that * one. */ - if (OFavail[asz - 1].mr_start + OFavail[asz - 1].mr_size > - OFmem[msz - 1].mr_start + OFmem[msz - 1].mr_size) - OFavail[asz - 1].mr_size = (OFmem[msz - 1].mr_start + - OFmem[msz - 1].mr_size) - OFavail[asz - 1].mr_start; + maxphysaddr = 0; + for (i = 0; i < msz; i++) + if (OFmem[i].mr_start + OFmem[i].mr_size > maxphysaddr) + maxphysaddr = OFmem[i].mr_start + OFmem[i].mr_size; + + if (OFavail[asz - 1].mr_start + OFavail[asz - 1].mr_size > maxphysaddr) + OFavail[asz - 1].mr_size = maxphysaddr - + OFavail[asz - 1].mr_start; /* * OFavail may have overlapping regions - collapse these @@ -328,19 +334,6 @@ OF_initial_setup(void *fdt_ptr, void *ju else ofw_real_mode = 1; - ofwcall = NULL; - - #ifdef __powerpc64__ - /* - * For PPC64, we need to use some hand-written - * asm trampolines to get to OF. - */ - if (openfirm != NULL) - ofwcall = ofw_32bit_mode_entry; - #else - ofwcall = openfirm; - #endif - fdt = fdt_ptr; #ifdef FDT_DTB_STATIC @@ -355,7 +348,7 @@ OF_bootstrap() { boolean_t status = FALSE; - if (ofwcall != NULL) { + if (openfirmware_entry != NULL) { if (ofw_real_mode) { status = OF_install(OFW_STD_REAL, 0); } else { @@ -376,6 +369,10 @@ OF_bootstrap() * background processes. */ ofw_quiesce(); + + /* + * If available, we need to instantiate RTAS. + */ } else if (fdt != NULL) { status = OF_install(OFW_FDT, 0); @@ -447,6 +444,7 @@ openfirmware_core(void *args) #endif result = ofwcall(args); + //result = ((int (*)(void *))(openfirmware_entry))(args); ofw_sprg_restore(); intr_restore(oldmsr); Added: projects/pseries/powerpc/ofw/ofwcall32.S ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ projects/pseries/powerpc/ofw/ofwcall32.S Wed May 18 14:55:16 2011 (r222057) @@ -0,0 +1,148 @@ +/*- + * Copyright (C) 2009-2011 Nathan Whitehorn + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/syscall.h> + +#include <machine/trap.h> +#include <machine/param.h> +#include <machine/spr.h> +#include <machine/asm.h> + +#define OFWSTKSZ 4096 /* 4K Open Firmware stack */ + +/* + * Globals + */ + .data +GLOBAL(ofmsr) + .long 0, 0, 0, 0, 0 /* msr/sprg0-3 used in Open Firmware */ +GLOBAL(rtasmsr) + .long 0 +GLOBAL(openfirmware_entry) + .long 0 /* Open Firmware entry point */ +GLOBAL(rtas_entry) + .long 0 /* RTAS entry point */ + + .align 4 +GLOBAL(ofwstk) + .space OFWSTKSZ + +/* + * Open Firmware Entry Point. May need to enter real mode. + * + * C prototype: int ofwcall(void *callbuffer); + */ + +ASENTRY(ofwcall) + mflr %r0 + stw %r0,4(%r1) + + /* Record the old MSR */ + mfmsr %r6 + + /* read client interface handler */ + lis %r4,openfirmware_entry@ha + lwz %r4,openfirmware_entry@l(%r4) + + /* + * Set the MSR to the OF value. This has the side effect of disabling + * exceptions, which prevents preemption later. + */ + + lis %r5,ofmsr@ha + lwz %r5,ofmsr@l(%r5) + mtmsr %r5 + isync + + /* + * Set up OF stack. This needs to be potentially accessible in real mode + * The pointer to the current kernel stack is placed at the very + * top of the stack along with the old MSR so we can get them back + * later. + */ + mr %r5,%r1 + lis %r1,(ofwstk+OFWSTKSZ-16)@ha + addi %r1,%r1,(ofwstk+OFWSTKSZ-16)@l + stw %r5,8(%r1) /* Save real stack pointer */ + stw %r6,12(%r1) /* Save old MSR */ + li %r5,0 + stw %r5,4(%r1) + stw %r5,0(%r1) + + /* Finally, branch to OF */ + mtctr %r4 + bctrl + + /* Reload stack pointer and MSR from the OFW stack */ + lwz %r6,12(%r1) + lwz %r1,8(%r1) + + /* Now set the real MSR */ + mtmsr %r6 + isync + + /* Return */ + lwz %r0,4(%r1) + mtlr %r0 + blr + +/* + * RTAS Entry Point. Similar to the OF one, but simpler (no separate stack) + * + * C prototype: int rtascall(void *callbuffer, void *rtas_privdat); + */ + +ASENTRY(rtascall) + mflr %r0 + stw %r0,4(%r1) + + /* Record the old MSR just below the bottom of the stack */ + mfmsr %r0 + stw %r0,-4(%r1) + + /* read client interface handler */ + lis %r5,rtas_entry@ha + lwz %r5,rtas_entry@l(%r5) + + /* Set the MSR to the RTAS value */ + lis %r6,rtasmsr@ha + lwz %r6,rtasmsr@l(%r6) + mtmsr %r6 + isync + + /* Branch to RTAS */ + mtctr %r5 + bctrl + + /* Now set the MSR back */ + lwz %r6,-4(%r1) + mtmsr %r6 + isync + + /* And return */ + lwz %r0,4(%r1) + mtlr %r0 + blr + Added: projects/pseries/powerpc/ofw/ofwcall64.S ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ projects/pseries/powerpc/ofw/ofwcall64.S Wed May 18 14:55:16 2011 (r222057) @@ -0,0 +1,288 @@ +/*- + * Copyright (C) 2009-2011 Nathan Whitehorn + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/syscall.h> + +#include <machine/trap.h> +#include <machine/param.h> +#include <machine/spr.h> +#include <machine/asm.h> + +#define OFWSTKSZ 4096 /* 4K Open Firmware stack */ + +/* + * Globals + */ + .data + .align 4 +GLOBAL(ofwstk) + .space OFWSTKSZ +GLOBAL(rtas_regsave) + .space 24 /* 3 * sizeof(register_t) */ +GLOBAL(ofmsr) + .llong 0, 0, 0, 0, 0 /* msr/sprg0-3 used in Open Firmware */ +GLOBAL(rtasmsr) + .llong 0 +GLOBAL(openfirmware_entry) + .llong 0 /* Open Firmware entry point */ +GLOBAL(rtas_entry) + .llong 0 /* RTAS entry point */ + +/* + * Open Firmware Real-mode Entry Point. This is a huge pain. + */ + +ASENTRY(ofwcall) + mflr %r0 + std %r0,16(%r1) + stdu %r1,-208(%r1) + + /* + * We need to save the following, because OF's register save/ + * restore code assumes that the contents of registers are + * at most 32 bits wide: lr, cr, r2, r13-r31, the old MSR. These + * get placed in that order in the stack. + */ + + mfcr %r4 + std %r4,48(%r1) + std %r13,56(%r1) + std %r14,64(%r1) + std %r15,72(%r1) + std %r16,80(%r1) + std %r17,88(%r1) + std %r18,96(%r1) + std %r19,104(%r1) + std %r20,112(%r1) + std %r21,120(%r1) + std %r22,128(%r1) + std %r23,136(%r1) + std %r24,144(%r1) + std %r25,152(%r1) + std %r26,160(%r1) + std %r27,168(%r1) + std %r28,176(%r1) + std %r29,184(%r1) + std %r30,192(%r1) + std %r31,200(%r1) + + /* Record the old MSR */ + mfmsr %r6 + + /* read client interface handler */ + lis %r4,openfirmware_entry@ha + ld %r4,openfirmware_entry@l(%r4) + + /* + * Set the MSR to the OF value. This has the side effect of disabling + * exceptions, which is important for the next few steps. + */ + + lis %r5,ofmsr@ha + ld %r5,ofmsr@l(%r5) + mtmsrd %r5 + isync + + /* + * Set up OF stack. This needs to be accessible in real mode and + * use the 32-bit ABI stack frame format. The pointer to the current + * kernel stack is placed at the very top of the stack along with + * the old MSR so we can get them back later. + */ + mr %r5,%r1 + lis %r1,(ofwstk+OFWSTKSZ-32)@ha + addi %r1,%r1,(ofwstk+OFWSTKSZ-32)@l + std %r5,8(%r1) /* Save real stack pointer */ + std %r2,16(%r1) /* Save old TOC */ + std %r6,24(%r1) /* Save old MSR */ + li %r5,0 + stw %r5,4(%r1) + stw %r5,0(%r1) + + /* Finally, branch to OF */ + mtctr %r4 + bctrl + + /* Reload stack pointer and MSR from the OFW stack */ + ld %r6,24(%r1) + ld %r2,16(%r1) + ld %r1,8(%r1) + + /* Now set the real MSR */ + mtmsrd %r6 + isync + + /* Sign-extend the return value from OF */ + extsw %r3,%r3 + + /* Restore all the non-volatile registers */ + ld %r5,48(%r1) + mtcr %r5 + ld %r13,56(%r1) + ld %r14,64(%r1) + ld %r15,72(%r1) + ld %r16,80(%r1) + ld %r17,88(%r1) + ld %r18,96(%r1) + ld %r19,104(%r1) + ld %r20,112(%r1) + ld %r21,120(%r1) + ld %r22,128(%r1) + ld %r23,136(%r1) + ld %r24,144(%r1) + ld %r25,152(%r1) + ld %r26,160(%r1) + ld %r27,168(%r1) + ld %r28,176(%r1) + ld %r29,184(%r1) + ld %r30,192(%r1) + ld %r31,200(%r1) + + /* Restore the stack and link register */ + ld %r1,0(%r1) + ld %r0,16(%r1) + mtlr %r0 + blr + +/* + * RTAS 32-bit Entry Point. Similar to the OF one, but simpler (no separate + * stack) + * + * C prototype: int rtas_32bit_entry(void *callbuffer, void *rtas_privdat); + */ + +ASENTRY(rtascall) + mflr %r0 + std %r0,16(%r1) + stdu %r1,-208(%r1) + + /* + * We need to save the following, because RTAS's register save/ + * restore code assumes that the contents of registers are + * at most 32 bits wide: lr, cr, r2, r13-r31, the old MSR. These + * get placed in that order in the stack. + */ + + mfcr %r5 + std %r5,48(%r1) + std %r13,56(%r1) + std %r14,64(%r1) + std %r15,72(%r1) + std %r16,80(%r1) + std %r17,88(%r1) + std %r18,96(%r1) + std %r19,104(%r1) + std %r20,112(%r1) + std %r21,120(%r1) + std %r22,128(%r1) + std %r23,136(%r1) + std %r24,144(%r1) + std %r25,152(%r1) + std %r26,160(%r1) + std %r27,168(%r1) + std %r28,176(%r1) + std %r29,184(%r1) + std %r30,192(%r1) + std %r31,200(%r1) + + /* Record the old MSR */ + mfmsr %r6 + + /* read client interface handler */ + lis %r5,rtas_entry@ha + ld %r5,rtas_entry@l(%r5) + + /* + * Set the MSR to the RTAS value. This has the side effect of disabling + * exceptions, which is important for the next few steps. + */ + + lis %r7,rtasmsr@ha + ld %r7,rtasmsr@l(%r7) + mtmsrd %r7 + isync + + /* + * Set up RTAS register save area, so that we can get back all of + * our 64-bit pointers. Save our stack pointer, the TOC, and the MSR. + * Put this in r1, since RTAS is obliged to save it. Kernel globals + * are below 4 GB, so this is safe. + */ + mr %r7,%r1 + lis %r1,rtas_regsave@ha + addi %r1,%r1,rtas_regsave@l + std %r7,0(%r1) /* Save 64-bit stack pointer */ + std %r2,8(%r1) /* Save TOC */ + std %r6,16(%r1) /* Save MSR */ + + /* Finally, branch to RTAS */ + mtctr %r5 + bctrl + + /* + * Reload stack pointer and MSR from the reg save area in r1. We are + * running in 32-bit mode at this point, so it doesn't matter if r1 + * has become sign-extended. + */ + ld %r6,16(%r1) + ld %r2,8(%r1) + ld %r1,0(%r1) + + /* Now set the real MSR */ + mtmsrd %r6 + isync + + /* Sign-extend the return value from RTAS */ + extsw %r3,%r3 + + /* Restore all the non-volatile registers */ + ld %r5,48(%r1) + mtcr %r5 + ld %r13,56(%r1) + ld %r14,64(%r1) + ld %r15,72(%r1) + ld %r16,80(%r1) + ld %r17,88(%r1) + ld %r18,96(%r1) + ld %r19,104(%r1) + ld %r20,112(%r1) + ld %r21,120(%r1) + ld %r22,128(%r1) + ld %r23,136(%r1) + ld %r24,144(%r1) + ld %r25,152(%r1) + ld %r26,160(%r1) + ld %r27,168(%r1) + ld %r28,176(%r1) + ld %r29,184(%r1) + ld %r30,192(%r1) + ld %r31,200(%r1) + + /* Restore the stack and link register */ + ld %r1,0(%r1) + ld %r0,16(%r1) + mtlr %r0 + blr + Copied: projects/pseries/powerpc/ofw/ofwmagic.S (from r221988, projects/pseries/powerpc/aim/ofwmagic.S) ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ projects/pseries/powerpc/ofw/ofwmagic.S Wed May 18 14:55:16 2011 (r222057, copy of r221988, projects/pseries/powerpc/aim/ofwmagic.S) @@ -0,0 +1,68 @@ +/* $FreeBSD$ */ +/* $NetBSD: ofwmagic.S,v 1.2 1997/10/09 08:38:18 jtc Exp $ */ + +/*- + * Copyright (c) 1997 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Jason R. Thorpe. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * Magic note section used by Open Firmware. + */ + + .section ".note" + + /*# note header */ + + /*# length of name */ + .long 8 + + /*# note descriptor size */ + .long 20 + + /*# note type (IEEE 1275) */ + .long 0x1275 + + /*# name of owner */ + .asciz "PowerPC" + .balign 4 + + + /*# note descriptor */ + + /*# real mode (-1) or virtual mode (0) */ + .long 0 + + /*# real-base */ + .long -1 + /*# real-size */ + .long -1 + + /*# virt-base */ + .long -1 + /*# virt-size */ + .long -1
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