OpenBIOS December 2015

openbios@openbios.org

9 participants
19 discussions

[PATCH 0/5] Enable bus master support for rtl8139 network cards on Apple PPC machines
by Mark Cave-Ayland 07 Aug '16

07 Aug '16

This patchset is loosely based on earlier work by BALATON Zoltan <balaton(a)eik.bme.hu> and provides basic infrastructure to allow OpenBIOS to enable PCI device bus mastering. Following on from discussions on the QEMU mailing list, it seems that Apple's OF enables bus mastering for some PCI devices by default, and as a result some buggy drivers forget to explicitly enable it and hence these devices fail under QEMU's emulation. The first 3 patches add the basic support routines while the last 2 patches enable bus mastering for the rtl8139 card on Apple PPC machines which is required for OS X and MorphOS. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk> Mark Cave-Ayland (5): pci: introduce ob_pci_enable_bus_master() function pci: introduce ob_pci_is_bus_master_capable() function pci: add PCI database entry for rtl8139 network card pci: add rtl8139_config_cb() to configure rtl8139 network cards ppc: mark PCI slots 0-2 for Apple PPC machies as bus master capable openbios-devel/arch/ppc/qemu/init.c | 9 ++++--- openbios-devel/drivers/pci.c | 44 +++++++++++++++++++++++++++++++++ openbios-devel/drivers/pci_database.c | 6 +++++ openbios-devel/drivers/pci_database.h | 4 +++ openbios-devel/include/drivers/pci.h | 2 ++ 5 files changed, 62 insertions(+), 3 deletions(-) -- 1.7.10.4

5 17

[PATCH] ppc: force target CPU
by Laurent Vivier 02 Feb '16

02 Feb '16

With gcc-5.2 default target is power7. As openbios targets PowerMacs G3/G4/G5, force gcc target to be G3 (32bit) or G5 (64bit). Signed-off-by: Laurent Vivier <laurent(a)vivier.eu> --- config/scripts/switch-arch | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/config/scripts/switch-arch b/config/scripts/switch-arch index 38d263d..bcf807a 100755 --- a/config/scripts/switch-arch +++ b/config/scripts/switch-arch @@ -265,7 +265,7 @@ for ARCH in $arch_list; do ppc) select_prefix powerpc powerpc64 if [ "$unix" = "no" ]; then - CFLAGS="-m32 -msoft-float -fno-builtin-bcopy -fno-builtin-log2" + CFLAGS="-m32 -mcpu=G3 -msoft-float -fno-builtin-bcopy -fno-builtin-log2" AS_FLAGS="-m32" else CFLAGS="-fno-builtin" @@ -275,7 +275,7 @@ for ARCH in $arch_list; do ppc64) select_prefix powerpc64 - CFLAGS="-Wa,-a64 -m64 -msoft-float -fno-builtin" + CFLAGS="-Wa,-a64 -m64 -mcpu=G5 -msoft-float -fno-builtin" AS_FLAGS="-Wa,-a64" ;; -- 2.5.0

8 35

[PATCH 0/5] macio: switch over to use 2 ata-3 controllers
by Mark Cave-Ayland 04 Jan '16

04 Jan '16

Further work on Darwin/OS X shows that IOKit expects both the hard disk and cdrom to be attached to the ata-3 controller for QEMU's mac99 machine. Currently OpenBIOS generates an ata-3 and an ata-4 controller (and by default attaches the cdrom to the ata-4 controller) meaning that IOKit would fail to locate and mount the cdrom on boot. Resolve this by instantiating 2 ata-3 controller nodes instead which also is a better match for a real device tree. The relevant changes to the device tree are shown below: Before: fff542a8 /pci@80000000/mac-io@3/ata-3@20000 (ata) fff54540 /pci@80000000/mac-io@3/ata-4@21000 (ata) fff547d8 /pci@80000000/mac-io@3/ata-4@21000/cdrom@0 (block) After: fff542a8 /pci@80000000/mac-io@3/ata-3@20000 (ata) fff54540 /pci@80000000/mac-io@3/ata-3@21000 (ata) fff547d8 /pci@80000000/mac-io@3/ata-3@21000/cdrom@0 (block) The OpenBIOS IDE code currently works by using the device name internally to reference the controller node, which of course breaks when 2 nodes are given the same name property. Patches 1-4 switch the OpenBIOS IDE code over to reference controller nodes by phandle rather than name, while patch 5 does the actual switch from 1 ata-3 and 1 ata-4 controller to 2 ata-3 controllers. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk> Mark Cave-Ayland (5): ide: use REGISTER_NAMED_NODE_PHANDLE rather than REGISTER_NAMED_NODE libopenbios: introduce new get_path_from_ph() helper function ide: switch IDE init functions over to use new get_path_from_ph() helper ide: reference IDE channels by phandle, not device name macio: switch over to use 2 ata-3 ide controllers openbios-devel/drivers/ide.c | 46 +++++++++---------------- openbios-devel/drivers/ide.h | 2 +- openbios-devel/drivers/pci.c | 8 ++--- openbios-devel/include/libopenbios/bindings.h | 1 + openbios-devel/libopenbios/bindings.c | 8 +++++ 5 files changed, 31 insertions(+), 34 deletions(-) -- 1.7.10.4

3 7

[PATCH 0/8] SPARC64 Forth context rework
by Mark Cave-Ayland 29 Dec '15

29 Dec '15

This patchset is aimed at unifying the code used to preserve CPU context when switching from client programs into Forth, via either the CIF or interrupt handlers. It is part of a longer process to enable access to saved CPU context state from within Forth which will eventually enable proper implementation of the init-program and go words. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk> Mark Cave-Ayland (8): SPARC64: create proper stack frame when entering client interface SPARC64: introduce new Forth context stack (fcstack) for CPU contexts SPARC64: switch client interface over to use new Forth context stack SPARC64: switch IMMU/DMMU miss handlers over to use new Forth context stack SPARC64: move client interface stack inline to the new Forth context stack SPARC64: move IMMU/DMMU miss handler stacks inline to the new Forth context stack SPARC64: reorganise IMMU/DMMU trap context structure SPARC64: rearrange saved state window order openbios-devel/arch/sparc64/call-client.S | 218 +++++---------------- openbios-devel/arch/sparc64/context.c | 4 + openbios-devel/arch/sparc64/cpustate.h | 244 +++++++++++++++++++++++ openbios-devel/arch/sparc64/ldscript | 5 + openbios-devel/arch/sparc64/vectors.S | 300 ++++++----------------------- openbios-devel/include/arch/sparc64/io.h | 2 +- 6 files changed, 367 insertions(+), 406 deletions(-) create mode 100644 openbios-devel/arch/sparc64/cpustate.h -- 1.7.10.4

1 9

[commit] r1366 - trunk/openbios-devel/arch/sparc64
by repository service 29 Dec '15

29 Dec '15

Author: mcayland Date: Tue Dec 29 16:50:44 2015 New Revision: 1366 URL: http://tracker.coreboot.org/trac/openbios/changeset/1366 Log: SPARC64: rearrange saved state window order Instead of storing the windows in numerical order, store them starting from %cwp. This means the current window can be located at a fixed point in the state, rather than calculating the offset based upon %cwp. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk> Modified: trunk/openbios-devel/arch/sparc64/cpustate.h Modified: trunk/openbios-devel/arch/sparc64/cpustate.h ============================================================================== --- trunk/openbios-devel/arch/sparc64/cpustate.h Tue Dec 29 16:50:41 2015 (r1365) +++ trunk/openbios-devel/arch/sparc64/cpustate.h Tue Dec 29 16:50:44 2015 (r1366) @@ -72,11 +72,15 @@ /* Get the number of windows in %g6 */ \ rdpr %ver, %g6; \ and %g6, 0xf, %g6; \ - inc %g6; \ + \ + mov %g6, %g4; \ + inc %g4; \ + \ + /* Starting cwp in g7 */ \ + rdpr %cwp, %g7; \ \ save_cpu_window_##type: \ - deccc %g6; \ - wrpr %g6, %cwp; \ + wrpr %g7, %cwp; \ stx %l0, [%g5]; \ stx %l1, [%g5 + 0x8]; \ stx %l2, [%g5 + 0x10]; \ @@ -93,6 +97,9 @@ stx %i5, [%g5 + 0x68]; \ stx %i6, [%g5 + 0x70]; \ stx %i7, [%g5 + 0x78]; \ + dec %g7; \ + and %g7, %g6, %g7; \ + subcc %g4, 1, %g4; \ bne save_cpu_window_##type; \ add %g5, 0x80, %g5; \ \ @@ -144,14 +151,18 @@ /* Get the number of windows in %g6 */ \ rdpr %ver, %g6; \ and %g6, 0xf, %g6; \ - inc %g6; \ + \ + mov %g6, %g4; \ + inc %g4; \ + \ + /* Set starting window */ \ + ldx [%g1], %g7; \ \ /* Now iterate through all of the windows restoring all l and i registers */ \ add %g1, 0x90, %g5; \ \ restore_cpu_window_##type: \ - deccc %g6; \ - wrpr %g6, %cwp; \ + wrpr %g7, %cwp; \ ldx [%g5], %l0; \ ldx [%g5 + 0x8], %l1; \ ldx [%g5 + 0x10], %l2; \ @@ -168,6 +179,9 @@ ldx [%g5 + 0x68], %i5; \ ldx [%g5 + 0x70], %i6; \ ldx [%g5 + 0x78], %i7; \ + dec %g7; \ + and %g7, %g6, %g7; \ + subcc %g4, 1, %g4; \ bne restore_cpu_window_##type; \ add %g5, 0x80, %g5; \ \

1 0

[commit] r1365 - trunk/openbios-devel/arch/sparc64
by repository service 29 Dec '15

29 Dec '15

Author: mcayland Date: Tue Dec 29 16:50:41 2015 New Revision: 1365 URL: http://tracker.coreboot.org/trac/openbios/changeset/1365 Log: SPARC64: reorganise IMMU/DMMU trap context structure Here the trap context is reorganised to share the same prologue as the CIF context so that they can be subsequently unified. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk> Added: trunk/openbios-devel/arch/sparc64/cpustate.h - copied, changed from r1364, trunk/openbios-devel/arch/sparc64/call-client.S Modified: trunk/openbios-devel/arch/sparc64/call-client.S trunk/openbios-devel/arch/sparc64/vectors.S Modified: trunk/openbios-devel/arch/sparc64/call-client.S ============================================================================== --- trunk/openbios-devel/arch/sparc64/call-client.S Tue Dec 29 16:50:39 2015 (r1364) +++ trunk/openbios-devel/arch/sparc64/call-client.S Tue Dec 29 16:50:41 2015 (r1365) @@ -1,3 +1,5 @@ +#include "cpustate.h" + .globl sparc64_of_client_interface, client_tba @@ -9,142 +11,6 @@ * behaviour of OBP. */ -#define SAVE_WINDOW_STATE(type) \ - rdpr %cwp, %g7; \ - stx %g7, [%g1]; \ - rdpr %cansave, %g7; \ - stx %g7, [%g1 + 0x8]; \ - rdpr %canrestore, %g7; \ - stx %g7, [%g1 + 0x10]; \ - rdpr %otherwin, %g7; \ - stx %g7, [%g1 + 0x18]; \ - rdpr %wstate, %g7; \ - stx %g7, [%g1 + 0x20]; \ - rdpr %cleanwin, %g7; \ - stx %g7, [%g1 + 0x28]; \ - \ - stx %o0, [%g1 + 0x30]; \ - stx %o1, [%g1 + 0x38]; \ - stx %o2, [%g1 + 0x40]; \ - stx %o3, [%g1 + 0x48]; \ - stx %o4, [%g1 + 0x50]; \ - stx %o5, [%g1 + 0x58]; \ - stx %o6, [%g1 + 0x60]; \ - stx %o7, [%g1 + 0x68]; \ - \ - rdpr %pstate, %g7; \ - stx %g7, [%g1 + 0x70]; \ - rd %y, %g7; \ - stx %g7, [%g1 + 0x78]; \ - rd %fprs, %g7; \ - stx %g7, [%g1 + 0x80]; \ - \ - /* Now iterate through all of the windows saving all l and i registers */ \ - add %g1, 0x90, %g5; \ - \ - /* Get the number of windows in %g6 */ \ - rdpr %ver, %g6; \ - and %g6, 0xf, %g6; \ - inc %g6; \ - \ -save_cpu_window_##type: \ - deccc %g6; \ - wrpr %g6, %cwp; \ - stx %l0, [%g5]; \ - stx %l1, [%g5 + 0x8]; \ - stx %l2, [%g5 + 0x10]; \ - stx %l3, [%g5 + 0x18]; \ - stx %l4, [%g5 + 0x20]; \ - stx %l5, [%g5 + 0x28]; \ - stx %l6, [%g5 + 0x30]; \ - stx %l7, [%g5 + 0x38]; \ - stx %i0, [%g5 + 0x40]; \ - stx %i1, [%g5 + 0x48]; \ - stx %i2, [%g5 + 0x50]; \ - stx %i3, [%g5 + 0x58]; \ - stx %i4, [%g5 + 0x60]; \ - stx %i5, [%g5 + 0x68]; \ - stx %i6, [%g5 + 0x70]; \ - stx %i7, [%g5 + 0x78]; \ - bne save_cpu_window_##type; \ - add %g5, 0x80, %g5; \ - \ - /* For 8 windows with 16 registers to save in the window, memory required \ - is 16*8*8 = 0x400 bytes */ \ - \ - /* Now we should be in window 0 so update the other window registers */ \ - rdpr %ver, %g6; \ - and %g6, 0xf, %g6; \ - dec %g6; \ - wrpr %g6, %cansave; \ - \ - wrpr %g0, %cleanwin; \ - wrpr %g0, %canrestore; \ - wrpr %g0, %otherwin; - - -#define RESTORE_WINDOW_STATE(type) \ - /* Get the number of windows in %g6 */ \ - rdpr %ver, %g6; \ - and %g6, 0xf, %g6; \ - inc %g6; \ - \ - /* Now iterate through all of the windows restoring all l and i registers */ \ - add %g1, 0x90, %g5; \ - \ -restore_cpu_window_##type: \ - deccc %g6; \ - wrpr %g6, %cwp; \ - ldx [%g5], %l0; \ - ldx [%g5 + 0x8], %l1; \ - ldx [%g5 + 0x10], %l2; \ - ldx [%g5 + 0x18], %l3; \ - ldx [%g5 + 0x20], %l4; \ - ldx [%g5 + 0x28], %l5; \ - ldx [%g5 + 0x30], %l6; \ - ldx [%g5 + 0x38], %l7; \ - ldx [%g5 + 0x40], %i0; \ - ldx [%g5 + 0x48], %i1; \ - ldx [%g5 + 0x50], %i2; \ - ldx [%g5 + 0x58], %i3; \ - ldx [%g5 + 0x60], %i4; \ - ldx [%g5 + 0x68], %i5; \ - ldx [%g5 + 0x70], %i6; \ - ldx [%g5 + 0x78], %i7; \ - bne restore_cpu_window_##type; \ - add %g5, 0x80, %g5; \ - \ - /* Restore the window registers to their original value */ \ - ldx [%g1], %g7; \ - wrpr %g7, %cwp; \ - ldx [%g1 + 0x8], %g7; \ - wrpr %g7, %cansave; \ - ldx [%g1 + 0x10], %g7; \ - wrpr %g7, %canrestore; \ - ldx [%g1 + 0x18], %g7; \ - wrpr %g7, %otherwin; \ - ldx [%g1 + 0x20], %g7; \ - wrpr %g7, %wstate; \ - ldx [%g1 + 0x28], %g7; \ - wrpr %g7, %cleanwin; \ - \ - ldx [%g1 + 0x30], %o0; \ - ldx [%g1 + 0x38], %o1; \ - ldx [%g1 + 0x40], %o2; \ - ldx [%g1 + 0x48], %o3; \ - ldx [%g1 + 0x50], %o4; \ - ldx [%g1 + 0x58], %o5; \ - ldx [%g1 + 0x60], %o6; \ - ldx [%g1 + 0x68], %o7; \ - \ - ldx [%g1 + 0x70], %g7; \ - wrpr %g7, %pstate; \ - ldx [%g1 + 0x78], %g7; \ - wr %g7, 0, %y; \ - ldx [%g1 + 0x80], %g7; \ - wr %g7, 0, %fprs - - .data .align 8 @@ -192,15 +58,15 @@ /* Save windows */ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g1 - add %g1, -0x510, %g1 + add %g1, -CONTEXT_STATE_SIZE, %g1 stx %g1, [%g7] - SAVE_WINDOW_STATE(cif) + SAVE_CPU_WINDOW_STATE(cif) /* Move to OpenBIOS context stack */ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g6 - setx 0x2000, %g4, %g5 + setx CONTEXT_STACK_SIZE, %g4, %g5 sub %g6, %g5, %g6 stx %g6, [%g7] @@ -215,16 +81,16 @@ /* Restore windows */ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g1 - setx 0x2000, %g4, %g5 + setx CONTEXT_STACK_SIZE, %g4, %g5 add %g1, %g5, %g1 stx %g1, [%g7] /* Return value */ stx %o0, [%g1 + 0x30] - RESTORE_WINDOW_STATE(cif) + RESTORE_CPU_WINDOW_STATE(cif) - add %g1, 0x510, %g1 + add %g1, CONTEXT_STATE_SIZE, %g1 setx _fcstack_ptr, %g6, %g7 stx %g1, [%g7] Copied and modified: trunk/openbios-devel/arch/sparc64/cpustate.h (from r1364, trunk/openbios-devel/arch/sparc64/call-client.S) ============================================================================== --- trunk/openbios-devel/arch/sparc64/call-client.S Tue Dec 29 16:50:39 2015 (r1364, copy source) +++ trunk/openbios-devel/arch/sparc64/cpustate.h Tue Dec 29 16:50:41 2015 (r1365) @@ -1,15 +1,40 @@ - .globl sparc64_of_client_interface, client_tba +/* + * Save/restore CPU state macros + * + * Copyright (C) 2015 Mark Cave-Ayland (mark.cave-ayland(a)ilande.co.uk>) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 + * + */ + +/* State size for context (see below) */ +#define CONTEXT_STATE_SIZE 0x510 +/* Stack size for context (allocated inline of the context stack) */ +#define CONTEXT_STACK_SIZE 0x2000 /* - * SAVE_WINDOW_STATE and RESTORE_WINDOW_STATE are used to ensure - * that the CPU window state is preserved across CIF calls. This is - * to workaround a *BSD restriction that window fill/spill traps must - * be minimised during trap table takeover, and likely emulates the - * behaviour of OBP. + * SAVE_CPU_STATE and RESTORE_CPU_STATE are macros used to enable a context switch + * to C to occur within the MMU I/D TLB miss handlers. + * + * Because these handlers are called on a TLB miss, we cannot use flushw to store + * processor window state on the stack, as the memory areas used by each window's + * stack pointer may not be in the TLB, causing recursive TLB miss traps. + * + * For this reason, we save window state by manually rotating the window registers + * and saving their contents (along with other vital registers) into a special + * tlb_handler_stack defined above which is guaranteed to be locked in the TLB, and + * so won't cause issues with trap recursion. + * + * Once this process is complete, we remain in a TL=0, CWP=0 state (with IE=1 to allow + * window fill/spill traps if required), switch to our safe tlb_handler_stack and + * invoke the miss handler. */ -#define SAVE_WINDOW_STATE(type) \ +#define SAVE_CPU_WINDOW_STATE(type) \ + /* Save window state into context at %g1 */ \ rdpr %cwp, %g7; \ stx %g7, [%g1]; \ rdpr %cansave, %g7; \ @@ -38,6 +63,8 @@ stx %g7, [%g1 + 0x78]; \ rd %fprs, %g7; \ stx %g7, [%g1 + 0x80]; \ + rdpr %tl, %g7; \ + stx %g7, [%g1 + 0x88]; \ \ /* Now iterate through all of the windows saving all l and i registers */ \ add %g1, 0x90, %g5; \ @@ -80,10 +107,40 @@ \ wrpr %g0, %cleanwin; \ wrpr %g0, %canrestore; \ - wrpr %g0, %otherwin; + wrpr %g0, %otherwin; \ + +#define SAVE_CPU_TRAP_STATE(type) \ + /* Save trap state into context at %g1 */ \ + add %g1, 0x490, %g5; \ + mov 4, %g6; \ + \ +save_trap_state_##type: \ + deccc %g6; \ + wrpr %g6, %tl; \ + rdpr %tpc, %g7; \ + stx %g7, [%g5]; \ + rdpr %tnpc, %g7; \ + stx %g7, [%g5 + 0x8]; \ + rdpr %tstate, %g7; \ + stx %g7, [%g5 + 0x10]; \ + rdpr %tt, %g7; \ + stx %g7, [%g5 + 0x18]; \ + bne save_trap_state_##type; \ + add %g5, 0x20, %g5; \ + \ + /* For 4 trap levels with 4 registers, memory required is \ + 4*8*4 = 0x80 bytes */ + +/* Save all state into context at %g1 */ +#define SAVE_CPU_STATE(type) \ + SAVE_CPU_WINDOW_STATE(type); \ + SAVE_CPU_TRAP_STATE(type); -#define RESTORE_WINDOW_STATE(type) \ + +#define RESTORE_CPU_WINDOW_STATE(type) \ + /* Restore window state from context at %g1 */ \ + \ /* Get the number of windows in %g6 */ \ rdpr %ver, %g6; \ and %g6, 0xf, %g6; \ @@ -142,111 +199,32 @@ ldx [%g1 + 0x78], %g7; \ wr %g7, 0, %y; \ ldx [%g1 + 0x80], %g7; \ - wr %g7, 0, %fprs - + wr %g7, 0, %fprs; \ - .data - .align 8 -client_stack: - .xword 0 -client_tba: - .xword 0 -client_window: - .skip 2048 - - - .text - .align 4 - .register %g2, #scratch - .register %g3, #scratch - .register %g6, #scratch - .register %g7, #scratch -/* - make some more space on stack since linux kernel only provides 128 bytes - without memory to spill registers (used by gcc in -O0 mode) -*/ - -sparc64_of_client_interface: - - /* Save globals on callers stack */ - add %sp, -248, %sp - - stx %g1, [%sp + 2047 + 192] - stx %g2, [%sp + 2047 + 200] - stx %g3, [%sp + 2047 + 208] - stx %g4, [%sp + 2047 + 216] - stx %g5, [%sp + 2047 + 224] - stx %g6, [%sp + 2047 + 232] - stx %g7, [%sp + 2047 + 240] - - /* Save client trap table */ - setx client_tba, %g6, %g7 - rdpr %tba, %g6 - stx %g6, [%g7] - - /* Save existing stack */ - setx client_stack, %g6, %g7 - stx %sp, [%g7] - - /* Save windows */ - setx _fcstack_ptr, %g6, %g7 - ldx [%g7], %g1 - add %g1, -0x510, %g1 - stx %g1, [%g7] - - SAVE_WINDOW_STATE(cif) - - /* Move to OpenBIOS context stack */ - setx _fcstack_ptr, %g6, %g7 - ldx [%g7], %g6 - setx 0x2000, %g4, %g5 - sub %g6, %g5, %g6 - stx %g6, [%g7] - - setx - 2047 - 192, %g6, %g7 - add %g1, %g7, %g7 - mov %g7, %sp - - /* Call client inteface */ - call of_client_interface - ldx [%g1 + 0x30], %o0 - - /* Restore windows */ - setx _fcstack_ptr, %g6, %g7 - ldx [%g7], %g1 - setx 0x2000, %g4, %g5 - add %g1, %g5, %g1 - stx %g1, [%g7] - - /* Return value */ - stx %o0, [%g1 + 0x30] - - RESTORE_WINDOW_STATE(cif) - - add %g1, 0x510, %g1 - setx _fcstack_ptr, %g6, %g7 - stx %g1, [%g7] - - /* Restore stack */ - setx client_stack, %g6, %g7 - ldx [%g7], %sp - - /* Restore client trap table */ - setx client_tba, %g6, %g7 - ldx [%g7], %g6 - wrpr %g6, %tba - - /* Restore globals */ - ldx [%sp + 2047 + 192], %g1 - ldx [%sp + 2047 + 200], %g2 - ldx [%sp + 2047 + 208], %g3 - ldx [%sp + 2047 + 216], %g4 - ldx [%sp + 2047 + 224], %g5 - ldx [%sp + 2047 + 232], %g6 - ldx [%sp + 2047 + 240], %g7 - - add %sp, 248, %sp - - jmp %o7+8 - nop +#define RESTORE_CPU_TRAP_STATE(type) \ + /* Restore trap state from context at %g1 */ \ + add %g1, 0x490, %g5; \ + mov 4, %g6; \ + \ +restore_trap_state_##type: \ + deccc %g6; \ + wrpr %g6, %tl; \ + ldx [%g5], %g7; \ + wrpr %g7, %tpc; \ + ldx [%g5 + 0x8], %g7; \ + wrpr %g7, %tnpc; \ + ldx [%g5 + 0x10], %g7; \ + wrpr %g7, %tstate; \ + ldx [%g5 + 0x18], %g7; \ + wrpr %g7, %tt; \ + bne restore_trap_state_##type; \ + add %g5, 0x20, %g5; \ + \ + ldx [%g1 + 0x88], %g7; \ + wrpr %g7, %tl + +/* Restore all state from context at %g1 */ +#define RESTORE_CPU_STATE(type) \ + RESTORE_CPU_WINDOW_STATE(type); \ + RESTORE_CPU_TRAP_STATE(type); Modified: trunk/openbios-devel/arch/sparc64/vectors.S ============================================================================== --- trunk/openbios-devel/arch/sparc64/vectors.S Tue Dec 29 16:50:39 2015 (r1364) +++ trunk/openbios-devel/arch/sparc64/vectors.S Tue Dec 29 16:50:41 2015 (r1365) @@ -24,6 +24,7 @@ */ #define __ASSEMBLY__ +#include "cpustate.h" #include "pstate.h" #include <asm/asi.h> #define ASI_BP ASI_PHYS_BYPASS_EC_E @@ -327,206 +328,6 @@ restored retry -/* - * SAVE_CPU_STATE and RESTORE_CPU_STATE are macros used to enable a context switch - * to C to occur within the MMU I/D TLB miss handlers. - * - * Because these handlers are called on a TLB miss, we cannot use flushw to store - * processor window state on the stack, as the memory areas used by each window's - * stack pointer may not be in the TLB, causing recursive TLB miss traps. - * - * For this reason, we save window state by manually rotating the window registers - * and saving their contents (along with other vital registers) into a special - * tlb_handler_stack defined above which is guaranteed to be locked in the TLB, and - * so won't cause issues with trap recursion. - * - * Once this process is complete, we remain in a TL=0, CWP=0 state (with IE=1 to allow - * window fill/spill traps if required), switch to our safe tlb_handler_stack and - * invoke the miss handler. - */ - -#define SAVE_CPU_STATE(type) \ - /* First save the various state registers */ \ - rdpr %cwp, %g7; \ - stx %g7, [%g1]; \ - rdpr %cansave, %g7; \ - stx %g7, [%g1 + 0x8]; \ - rdpr %canrestore, %g7; \ - stx %g7, [%g1 + 0x10]; \ - rdpr %otherwin, %g7; \ - stx %g7, [%g1 + 0x18]; \ - rdpr %wstate, %g7; \ - stx %g7, [%g1 + 0x20]; \ - rdpr %cleanwin, %g7; \ - stx %g7, [%g1 + 0x28]; \ - rdpr %pstate, %g7; \ - stx %g7, [%g1 + 0x30]; \ - \ - rd %y, %g7; \ - stx %g7, [%g1 + 0x38]; \ - rd %fprs, %g7; \ - stx %g7, [%g1 + 0x40]; \ - \ - rdpr %tl, %g7; \ - stx %g7, [%g1 + 0x48]; \ - \ - /* Trap state */ \ - add %g1, 0x50, %g5; \ - mov 4, %g6; \ - \ -save_trap_state_##type: \ - deccc %g6; \ - wrpr %g6, %tl; \ - rdpr %tpc, %g7; \ - stx %g7, [%g5]; \ - rdpr %tnpc, %g7; \ - stx %g7, [%g5 + 0x8]; \ - rdpr %tstate, %g7; \ - stx %g7, [%g5 + 0x10]; \ - rdpr %tt, %g7; \ - stx %g7, [%g5 + 0x18]; \ - bne save_trap_state_##type; \ - add %g5, 0x20, %g5; \ - \ - /* For 4 trap levels with 4 registers, memory required is - 4*8*4 = 0x80 bytes */ \ - \ - /* Save the o registers */ \ - stx %o0, [%g1 + 0xd0]; \ - stx %o1, [%g1 + 0xd8]; \ - stx %o2, [%g1 + 0xe0]; \ - stx %o3, [%g1 + 0xe8]; \ - stx %o4, [%g1 + 0xf0]; \ - stx %o5, [%g1 + 0xf8]; \ - stx %o6, [%g1 + 0x100]; \ - stx %o7, [%g1 + 0x108]; \ - \ - /* Now iterate through all of the windows saving all l and i registers */ \ - add %g1, 0x110, %g5; \ - \ - /* Get the number of windows in %g6 */ \ - rdpr %ver, %g6; \ - and %g6, 0xf, %g6; \ - inc %g6; \ - \ -save_cpu_window_##type: \ - deccc %g6; \ - wrpr %g6, %cwp; \ - stx %l0, [%g5]; \ - stx %l1, [%g5 + 0x8]; \ - stx %l2, [%g5 + 0x10]; \ - stx %l3, [%g5 + 0x18]; \ - stx %l4, [%g5 + 0x20]; \ - stx %l5, [%g5 + 0x28]; \ - stx %l6, [%g5 + 0x30]; \ - stx %l7, [%g5 + 0x38]; \ - stx %i0, [%g5 + 0x40]; \ - stx %i1, [%g5 + 0x48]; \ - stx %i2, [%g5 + 0x50]; \ - stx %i3, [%g5 + 0x58]; \ - stx %i4, [%g5 + 0x60]; \ - stx %i5, [%g5 + 0x68]; \ - stx %i6, [%g5 + 0x70]; \ - stx %i7, [%g5 + 0x78]; \ - bne save_cpu_window_##type; \ - add %g5, 0x80, %g5; \ - \ - /* For 8 windows with 16 registers to save in the window, memory required - is 16*8*8 = 0x400 bytes */ \ - \ - /* Now we should be in window 0 so update the other window registers */ \ - rdpr %ver, %g6; \ - and %g6, 0xf, %g6; \ - dec %g6; \ - wrpr %g6, %cansave; \ - \ - wrpr %g0, %cleanwin; \ - wrpr %g0, %canrestore; \ - wrpr %g0, %otherwin - - -#define RESTORE_CPU_STATE(type) \ - /* Get the number of windows in %g6 */ \ - rdpr %ver, %g6; \ - and %g6, 0xf, %g6; \ - inc %g6; \ - \ - /* Now iterate through all of the windows restoring all l and i registers */ \ - add %g1, 0x110, %g5; \ - \ -restore_cpu_window_##type: \ - deccc %g6; \ - wrpr %g6, %cwp; \ - ldx [%g5], %l0; \ - ldx [%g5 + 0x8], %l1; \ - ldx [%g5 + 0x10], %l2; \ - ldx [%g5 + 0x18], %l3; \ - ldx [%g5 + 0x20], %l4; \ - ldx [%g5 + 0x28], %l5; \ - ldx [%g5 + 0x30], %l6; \ - ldx [%g5 + 0x38], %l7; \ - ldx [%g5 + 0x40], %i0; \ - ldx [%g5 + 0x48], %i1; \ - ldx [%g5 + 0x50], %i2; \ - ldx [%g5 + 0x58], %i3; \ - ldx [%g5 + 0x60], %i4; \ - ldx [%g5 + 0x68], %i5; \ - ldx [%g5 + 0x70], %i6; \ - ldx [%g5 + 0x78], %i7; \ - bne restore_cpu_window_##type; \ - add %g5, 0x80, %g5; \ - \ - /* Restore the window registers to their original value */ \ - ldx [%g1], %g7; \ - wrpr %g7, %cwp; \ - ldx [%g1 + 0x8], %g7; \ - wrpr %g7, %cansave; \ - ldx [%g1 + 0x10], %g7; \ - wrpr %g7, %canrestore; \ - ldx [%g1 + 0x18], %g7; \ - wrpr %g7, %otherwin; \ - ldx [%g1 + 0x20], %g7; \ - wrpr %g7, %wstate; \ - ldx [%g1 + 0x28], %g7; \ - wrpr %g7, %cleanwin; \ - ldx [%g1 + 0x30], %g7; \ - wrpr %g7, %pstate; \ - \ - /* Restore the o registers */ \ - ldx [%g1 + 0xd0], %o0; \ - ldx [%g1 + 0xd8], %o1; \ - ldx [%g1 + 0xe0], %o2; \ - ldx [%g1 + 0xe8], %o3; \ - ldx [%g1 + 0xf0], %o4; \ - ldx [%g1 + 0xf8], %o5; \ - ldx [%g1 + 0x100], %o6; \ - ldx [%g1 + 0x108], %o7; \ - \ - /* Restore the trap state */ \ - add %g1, 0x50, %g5; \ - mov 4, %g6; \ - \ -restore_trap_state_##type: \ - deccc %g6; \ - wrpr %g6, %tl; \ - ldx [%g5], %g7; \ - wrpr %g7, %tpc; \ - ldx [%g5 + 0x8], %g7; \ - wrpr %g7, %tnpc; \ - ldx [%g5 + 0x10], %g7; \ - wrpr %g7, %tstate; \ - ldx [%g5 + 0x18], %g7; \ - wrpr %g7, %tt; \ - bne restore_trap_state_##type; \ - add %g5, 0x20, %g5; \ - \ - ldx [%g1 + 0x38], %g7; \ - wr %g7, 0, %y; \ - ldx [%g1 + 0x40], %g7; \ - wr %g7, 0, %fprs; \ - ldx [%g1 + 0x48], %g7; \ - wrpr %g7, %tl - .globl reload_DMMU_tlb, reload_IMMU_tlb, bug @@ -535,7 +336,7 @@ /* Save CPU state to stack */ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g1 - add %g1, -0x510, %g1 + add %g1, -CONTEXT_STATE_SIZE, %g1 stx %g1, [%g7] SAVE_CPU_STATE(dtlb) @@ -544,7 +345,7 @@ gcc to save its arguments when building with -O0) */ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g6 - setx 0x2000, %g4, %g5 + setx CONTEXT_STACK_SIZE, %g4, %g5 sub %g6, %g5, %g6 stx %g6, [%g7] @@ -568,7 +369,7 @@ /* Restore CPU state from stack */ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g1 - setx 0x2000, %g4, %g5 + setx CONTEXT_STACK_SIZE, %g4, %g5 add %g1, %g5, %g1 stx %g1, [%g7] @@ -576,7 +377,7 @@ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g1 - add %g1, 0x510, %g1 + add %g1, CONTEXT_STATE_SIZE, %g1 stx %g1, [%g7] retry @@ -586,7 +387,7 @@ /* Save CPU state to stack */ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g1 - add %g1, -0x510, %g1 + add %g1, -CONTEXT_STATE_SIZE, %g1 stx %g1, [%g7] SAVE_CPU_STATE(itlb) @@ -595,7 +396,7 @@ gcc to save its arguments when building with -O0) */ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g6 - setx 0x2000, %g4, %g5 + setx CONTEXT_STACK_SIZE, %g4, %g5 sub %g6, %g5, %g6 stx %g6, [%g7] @@ -619,7 +420,7 @@ /* Restore CPU state from stack */ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g1 - setx 0x2000, %g4, %g5 + setx CONTEXT_STACK_SIZE, %g4, %g5 add %g1, %g5, %g1 stx %g1, [%g7] @@ -627,7 +428,7 @@ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g1 - add %g1, 0x510, %g1 + add %g1, CONTEXT_STATE_SIZE, %g1 stx %g1, [%g7] retry

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[commit] r1364 - trunk/openbios-devel/arch/sparc64
by repository service 29 Dec '15

29 Dec '15

Author: mcayland Date: Tue Dec 29 16:50:39 2015 New Revision: 1364 URL: http://tracker.coreboot.org/trac/openbios/changeset/1364 Log: SPARC64: move IMMU/DMMU miss handler stacks inline to the new Forth context stack Rather than having a separate OpenBIOS stack for IMMU/DMMU miss handlers, reuse the Forth context stack by reserving 8K extra beneath the CPU save state area and using that instead. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk> Modified: trunk/openbios-devel/arch/sparc64/vectors.S Modified: trunk/openbios-devel/arch/sparc64/vectors.S ============================================================================== --- trunk/openbios-devel/arch/sparc64/vectors.S Tue Dec 29 16:50:36 2015 (r1363) +++ trunk/openbios-devel/arch/sparc64/vectors.S Tue Dec 29 16:50:39 2015 (r1364) @@ -276,17 +276,8 @@ .section ".data" .align 8 - .globl tlb_handler_stack_top, tlb_handler_stack_pointer, obp_ticks_pointer + .globl obp_ticks_pointer - ! Stack for the tlb MMU trap handlers -tlb_handler_stack_bottom: - .skip 8192 -tlb_handler_stack_top: - .skip 8 - - ! MMU trap handler stack pointer -tlb_handler_stack_pointer: - .xword tlb_handler_stack_top ! Pointer to current tick value obp_ticks_pointer: @@ -549,10 +540,17 @@ SAVE_CPU_STATE(dtlb) - /* Switch to TLB locked stack space (note we add an additional 192 bytes required for + /* Switch to 8K TLB locked OpenBIOS stack (note we add an additional 192 bytes required for gcc to save its arguments when building with -O0) */ - setx tlb_handler_stack_top, %g6, %g1 - add %g1, -STACK_BIAS - 192, %sp + setx _fcstack_ptr, %g6, %g7 + ldx [%g7], %g6 + setx 0x2000, %g4, %g5 + sub %g6, %g5, %g6 + stx %g6, [%g7] + + setx - 2047 - 192, %g6, %g7 + add %g1, %g7, %g7 + mov %g7, %sp /* Enable interrupts for window spill/fill traps */ rdpr %pstate, %g7 @@ -570,6 +568,9 @@ /* Restore CPU state from stack */ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g1 + setx 0x2000, %g4, %g5 + add %g1, %g5, %g1 + stx %g1, [%g7] RESTORE_CPU_STATE(dtlb) @@ -590,10 +591,17 @@ SAVE_CPU_STATE(itlb) - /* Switch to TLB locked stack space (note we add an additional 192 bytes required for + /* Switch to 8K TLB locked OpenBIOS stack (note we add an additional 192 bytes required for gcc to save its arguments when building with -O0) */ - setx tlb_handler_stack_top, %g6, %g1 - add %g1, -STACK_BIAS - 192, %sp + setx _fcstack_ptr, %g6, %g7 + ldx [%g7], %g6 + setx 0x2000, %g4, %g5 + sub %g6, %g5, %g6 + stx %g6, [%g7] + + setx - 2047 - 192, %g6, %g7 + add %g1, %g7, %g7 + mov %g7, %sp /* Enable interrupts for window spill/fill traps */ rdpr %pstate, %g7 @@ -611,6 +619,9 @@ /* Restore CPU state from stack */ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g1 + setx 0x2000, %g4, %g5 + add %g1, %g5, %g1 + stx %g1, [%g7] RESTORE_CPU_STATE(itlb)

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[commit] r1363 - trunk/openbios-devel/arch/sparc64
by repository service 29 Dec '15

29 Dec '15

Author: mcayland Date: Tue Dec 29 16:50:36 2015 New Revision: 1363 URL: http://tracker.coreboot.org/trac/openbios/changeset/1363 Log: SPARC64: move client interface stack inline to the new Forth context stack Rather than having a separate OpenBIOS stack for client interface calls, reuse the Forth stack by reserving 8K extra beneath the CPU save state area and using that instead. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk> Modified: trunk/openbios-devel/arch/sparc64/call-client.S Modified: trunk/openbios-devel/arch/sparc64/call-client.S ============================================================================== --- trunk/openbios-devel/arch/sparc64/call-client.S Tue Dec 29 16:50:34 2015 (r1362) +++ trunk/openbios-devel/arch/sparc64/call-client.S Tue Dec 29 16:50:36 2015 (r1363) @@ -148,9 +148,6 @@ .data .align 8 - .skip 16384 -openbios_stack: - client_stack: .xword 0 client_tba: @@ -200,8 +197,15 @@ SAVE_WINDOW_STATE(cif) - /* Move to OpenBIOS stack */ - setx openbios_stack - 2047 - 192, %g6, %g7 + /* Move to OpenBIOS context stack */ + setx _fcstack_ptr, %g6, %g7 + ldx [%g7], %g6 + setx 0x2000, %g4, %g5 + sub %g6, %g5, %g6 + stx %g6, [%g7] + + setx - 2047 - 192, %g6, %g7 + add %g1, %g7, %g7 mov %g7, %sp /* Call client inteface */ @@ -211,6 +215,9 @@ /* Restore windows */ setx _fcstack_ptr, %g6, %g7 ldx [%g7], %g1 + setx 0x2000, %g4, %g5 + add %g1, %g5, %g1 + stx %g1, [%g7] /* Return value */ stx %o0, [%g1 + 0x30]

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[commit] r1362 - trunk/openbios-devel/arch/sparc64
by repository service 29 Dec '15

29 Dec '15

Author: mcayland Date: Tue Dec 29 16:50:34 2015 New Revision: 1362 URL: http://tracker.coreboot.org/trac/openbios/changeset/1362 Log: SPARC64: switch IMMU/DMMU miss handlers over to use new Forth context stack Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk> Modified: trunk/openbios-devel/arch/sparc64/vectors.S Modified: trunk/openbios-devel/arch/sparc64/vectors.S ============================================================================== --- trunk/openbios-devel/arch/sparc64/vectors.S Tue Dec 29 16:50:31 2015 (r1361) +++ trunk/openbios-devel/arch/sparc64/vectors.S Tue Dec 29 16:50:34 2015 (r1362) @@ -355,11 +355,6 @@ */ #define SAVE_CPU_STATE(type) \ - /* Set up our exception stack pointer in %g1 */ \ - setx tlb_handler_stack_pointer, %g7, %g6; \ - ldx [%g6], %g1; \ - add %g1, -0x510, %g1; \ - \ /* First save the various state registers */ \ rdpr %cwp, %g7; \ stx %g7, [%g1]; \ @@ -456,18 +451,10 @@ \ wrpr %g0, %cleanwin; \ wrpr %g0, %canrestore; \ - wrpr %g0, %otherwin; \ - \ - /* Update our exception stack pointer */ \ - setx tlb_handler_stack_pointer, %g7, %g6; \ - stx %g1, [%g6]; + wrpr %g0, %otherwin #define RESTORE_CPU_STATE(type) \ - /* Set up our exception stack pointer in %g1 */ \ - setx tlb_handler_stack_pointer, %g7, %g6; \ - ldx [%g6], %g1; \ - \ /* Get the number of windows in %g6 */ \ rdpr %ver, %g6; \ and %g6, 0xf, %g6; \ @@ -547,22 +534,24 @@ ldx [%g1 + 0x40], %g7; \ wr %g7, 0, %fprs; \ ldx [%g1 + 0x48], %g7; \ - wrpr %g7, %tl; \ - \ - /* Restore exception stack pointer to previous value */ \ - setx tlb_handler_stack_pointer, %g7, %g6; \ - add %g1, 0x510, %g1; \ - stx %g1, [%g6]; + wrpr %g7, %tl .globl reload_DMMU_tlb, reload_IMMU_tlb, bug reload_DMMU_tlb: - + + /* Save CPU state to stack */ + setx _fcstack_ptr, %g6, %g7 + ldx [%g7], %g1 + add %g1, -0x510, %g1 + stx %g1, [%g7] + SAVE_CPU_STATE(dtlb) /* Switch to TLB locked stack space (note we add an additional 192 bytes required for gcc to save its arguments when building with -O0) */ + setx tlb_handler_stack_top, %g6, %g1 add %g1, -STACK_BIAS - 192, %sp /* Enable interrupts for window spill/fill traps */ @@ -577,17 +566,33 @@ rdpr %pstate, %g7 andn %g7, PSTATE_IE, %g7 wrpr %g7, %pstate - + + /* Restore CPU state from stack */ + setx _fcstack_ptr, %g6, %g7 + ldx [%g7], %g1 + RESTORE_CPU_STATE(dtlb) - + + setx _fcstack_ptr, %g6, %g7 + ldx [%g7], %g1 + add %g1, 0x510, %g1 + stx %g1, [%g7] + retry reload_IMMU_tlb: - + + /* Save CPU state to stack */ + setx _fcstack_ptr, %g6, %g7 + ldx [%g7], %g1 + add %g1, -0x510, %g1 + stx %g1, [%g7] + SAVE_CPU_STATE(itlb) /* Switch to TLB locked stack space (note we add an additional 192 bytes required for gcc to save its arguments when building with -O0) */ + setx tlb_handler_stack_top, %g6, %g1 add %g1, -STACK_BIAS - 192, %sp /* Enable interrupts for window spill/fill traps */ @@ -602,8 +607,17 @@ rdpr %pstate, %g7 andn %g7, PSTATE_IE, %g7 wrpr %g7, %pstate - + + /* Restore CPU state from stack */ + setx _fcstack_ptr, %g6, %g7 + ldx [%g7], %g1 + RESTORE_CPU_STATE(itlb) + + setx _fcstack_ptr, %g6, %g7 + ldx [%g7], %g1 + add %g1, 0x510, %g1 + stx %g1, [%g7] retry

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[commit] r1361 - trunk/openbios-devel/arch/sparc64
by repository service 29 Dec '15

29 Dec '15

Author: mcayland Date: Tue Dec 29 16:50:31 2015 New Revision: 1361 URL: http://tracker.coreboot.org/trac/openbios/changeset/1361 Log: SPARC64: switch client interface over to use new Forth context stack Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk> Modified: trunk/openbios-devel/arch/sparc64/call-client.S Modified: trunk/openbios-devel/arch/sparc64/call-client.S ============================================================================== --- trunk/openbios-devel/arch/sparc64/call-client.S Tue Dec 29 16:50:29 2015 (r1360) +++ trunk/openbios-devel/arch/sparc64/call-client.S Tue Dec 29 16:50:31 2015 (r1361) @@ -10,7 +10,6 @@ */ #define SAVE_WINDOW_STATE(type) \ - setx client_window, %g6, %g1; \ rdpr %cwp, %g7; \ stx %g7, [%g1]; \ rdpr %cansave, %g7; \ @@ -85,8 +84,6 @@ #define RESTORE_WINDOW_STATE(type) \ - setx client_window, %g6, %g1; \ - \ /* Get the number of windows in %g6 */ \ rdpr %ver, %g6; \ and %g6, 0xf, %g6; \ @@ -196,6 +193,11 @@ stx %sp, [%g7] /* Save windows */ + setx _fcstack_ptr, %g6, %g7 + ldx [%g7], %g1 + add %g1, -0x510, %g1 + stx %g1, [%g7] + SAVE_WINDOW_STATE(cif) /* Move to OpenBIOS stack */ @@ -206,12 +208,19 @@ call of_client_interface ldx [%g1 + 0x30], %o0 - setx client_window, %g6, %g1 - stx %o0, [%g1 + 0x30] - /* Restore windows */ + setx _fcstack_ptr, %g6, %g7 + ldx [%g7], %g1 + + /* Return value */ + stx %o0, [%g1 + 0x30] + RESTORE_WINDOW_STATE(cif) - + + add %g1, 0x510, %g1 + setx _fcstack_ptr, %g6, %g7 + stx %g1, [%g7] + /* Restore stack */ setx client_stack, %g6, %g7 ldx [%g7], %sp

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