diff options
author | Paul Mackerras <paulus@samba.org> | 2006-04-28 02:28:35 -0400 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2006-04-28 02:28:35 -0400 |
commit | f709bfac48492e289ba78ea1e8c0b3daab264e90 (patch) | |
tree | 3820f13761317bf0ac1844aff8b97e8022f5a8cc /arch/powerpc/kernel/prom_init.c | |
parent | f10a04c034c7285a1b15dfa4a83d3e56578e34e8 (diff) |
powerpc/pseries: Tell firmware our capabilities on new machines
This adds code to call a new firmware method to tell the firmware
what machines and capabilities (such as VMX/Altivec) we support.
This will be needed on POWER5+ and POWER6 machines, and it has no
effect on past and current machines.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/prom_init.c')
-rw-r--r-- | arch/powerpc/kernel/prom_init.c | 111 |
1 files changed, 107 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 7e4d54821a07..00ad7f981a0d 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c | |||
@@ -636,10 +636,95 @@ static void __init early_cmdline_parse(void) | |||
636 | 636 | ||
637 | #ifdef CONFIG_PPC_PSERIES | 637 | #ifdef CONFIG_PPC_PSERIES |
638 | /* | 638 | /* |
639 | * To tell the firmware what our capabilities are, we have to pass | 639 | * There are two methods for telling firmware what our capabilities are. |
640 | * it a fake 32-bit ELF header containing a couple of PT_NOTE sections | 640 | * Newer machines have an "ibm,client-architecture-support" method on the |
641 | * that contain structures that contain the actual values. | 641 | * root node. For older machines, we have to call the "process-elf-header" |
642 | * method in the /packages/elf-loader node, passing it a fake 32-bit | ||
643 | * ELF header containing a couple of PT_NOTE sections that contain | ||
644 | * structures that contain various information. | ||
642 | */ | 645 | */ |
646 | |||
647 | /* | ||
648 | * New method - extensible architecture description vector. | ||
649 | * | ||
650 | * Because the description vector contains a mix of byte and word | ||
651 | * values, we declare it as an unsigned char array, and use this | ||
652 | * macro to put word values in. | ||
653 | */ | ||
654 | #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \ | ||
655 | ((x) >> 8) & 0xff, (x) & 0xff | ||
656 | |||
657 | /* Option vector bits - generic bits in byte 1 */ | ||
658 | #define OV_IGNORE 0x80 /* ignore this vector */ | ||
659 | #define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/ | ||
660 | |||
661 | /* Option vector 1: processor architectures supported */ | ||
662 | #define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */ | ||
663 | #define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */ | ||
664 | #define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */ | ||
665 | #define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */ | ||
666 | #define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */ | ||
667 | #define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */ | ||
668 | |||
669 | /* Option vector 2: Open Firmware options supported */ | ||
670 | #define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */ | ||
671 | |||
672 | /* Option vector 3: processor options supported */ | ||
673 | #define OV3_FP 0x80 /* floating point */ | ||
674 | #define OV3_VMX 0x40 /* VMX/Altivec */ | ||
675 | |||
676 | /* Option vector 5: PAPR/OF options supported */ | ||
677 | #define OV5_LPAR 0x80 /* logical partitioning supported */ | ||
678 | #define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */ | ||
679 | /* ibm,dynamic-reconfiguration-memory property supported */ | ||
680 | #define OV5_DRCONF_MEMORY 0x20 | ||
681 | #define OV5_LARGE_PAGES 0x10 /* large pages supported */ | ||
682 | |||
683 | /* | ||
684 | * The architecture vector has an array of PVR mask/value pairs, | ||
685 | * followed by # option vectors - 1, followed by the option vectors. | ||
686 | */ | ||
687 | static unsigned char ibm_architecture_vec[] = { | ||
688 | W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */ | ||
689 | W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */ | ||
690 | 5 - 1, /* 5 option vectors */ | ||
691 | |||
692 | /* option vector 1: processor architectures supported */ | ||
693 | 3 - 1, /* length */ | ||
694 | 0, /* don't ignore, don't halt */ | ||
695 | OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | | ||
696 | OV1_PPC_2_04 | OV1_PPC_2_05, | ||
697 | |||
698 | /* option vector 2: Open Firmware options supported */ | ||
699 | 34 - 1, /* length */ | ||
700 | OV2_REAL_MODE, | ||
701 | 0, 0, | ||
702 | W(0xffffffff), /* real_base */ | ||
703 | W(0xffffffff), /* real_size */ | ||
704 | W(0xffffffff), /* virt_base */ | ||
705 | W(0xffffffff), /* virt_size */ | ||
706 | W(0xffffffff), /* load_base */ | ||
707 | W(64), /* 128MB min RMA */ | ||
708 | W(0xffffffff), /* full client load */ | ||
709 | 0, /* min RMA percentage of total RAM */ | ||
710 | 48, /* max log_2(hash table size) */ | ||
711 | |||
712 | /* option vector 3: processor options supported */ | ||
713 | 3 - 1, /* length */ | ||
714 | 0, /* don't ignore, don't halt */ | ||
715 | OV3_FP | OV3_VMX, | ||
716 | |||
717 | /* option vector 4: IBM PAPR implementation */ | ||
718 | 2 - 1, /* length */ | ||
719 | 0, /* don't halt */ | ||
720 | |||
721 | /* option vector 5: PAPR/OF options */ | ||
722 | 3 - 1, /* length */ | ||
723 | 0, /* don't ignore, don't halt */ | ||
724 | OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES, | ||
725 | }; | ||
726 | |||
727 | /* Old method - ELF header with PT_NOTE sections */ | ||
643 | static struct fake_elf { | 728 | static struct fake_elf { |
644 | Elf32_Ehdr elfhdr; | 729 | Elf32_Ehdr elfhdr; |
645 | Elf32_Phdr phdr[2]; | 730 | Elf32_Phdr phdr[2]; |
@@ -728,8 +813,26 @@ static struct fake_elf { | |||
728 | 813 | ||
729 | static void __init prom_send_capabilities(void) | 814 | static void __init prom_send_capabilities(void) |
730 | { | 815 | { |
731 | ihandle elfloader; | 816 | ihandle elfloader, root; |
817 | prom_arg_t ret; | ||
818 | |||
819 | root = call_prom("open", 1, 1, ADDR("/")); | ||
820 | if (root != 0) { | ||
821 | /* try calling the ibm,client-architecture-support method */ | ||
822 | if (call_prom_ret("call-method", 3, 2, &ret, | ||
823 | ADDR("ibm,client-architecture-support"), | ||
824 | ADDR(ibm_architecture_vec)) == 0) { | ||
825 | /* the call exists... */ | ||
826 | if (ret) | ||
827 | prom_printf("WARNING: ibm,client-architecture" | ||
828 | "-support call FAILED!\n"); | ||
829 | call_prom("close", 1, 0, root); | ||
830 | return; | ||
831 | } | ||
832 | call_prom("close", 1, 0, root); | ||
833 | } | ||
732 | 834 | ||
835 | /* no ibm,client-architecture-support call, try the old way */ | ||
733 | elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader")); | 836 | elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader")); |
734 | if (elfloader == 0) { | 837 | if (elfloader == 0) { |
735 | prom_printf("couldn't open /packages/elf-loader\n"); | 838 | prom_printf("couldn't open /packages/elf-loader\n"); |