/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __SPARC_SWITCH_TO_H #define __SPARC_SWITCH_TO_H #include <asm/smp.h> extern struct thread_info *current_set[NR_CPUS]; /* * Flush windows so that the VM switch which follows * would not pull the stack from under us. * * SWITCH_ENTER and SWITCH_DO_LAZY_FPU do not work yet (e.g. SMP does not work) * XXX WTF is the above comment? Found in late teen 2.4.x. */ #ifdef CONFIG_SMP #define SWITCH_ENTER(prv) \ do { \ if (test_tsk_thread_flag(prv, TIF_USEDFPU)) { \ put_psr(get_psr() | PSR_EF); \ fpsave(&(prv)->thread.float_regs[0], &(prv)->thread.fsr, \ &(prv)->thread.fpqueue[0], &(prv)->thread.fpqdepth); \ clear_tsk_thread_flag(prv, TIF_USEDFPU); \ (prv)->thread.kregs->psr &= ~PSR_EF; \ } \ } while(0) #define SWITCH_DO_LAZY_FPU(next) /* */ #else #define SWITCH_ENTER(prv) /* */ #define SWITCH_DO_LAZY_FPU(nxt) \ do { \ if (last_task_used_math != (nxt)) \ (nxt)->thread.kregs->psr&=~PSR_EF; \ } while(0) #endif #define prepare_arch_switch(next) do { \ __asm__ __volatile__( \ ".globl\tflush_patch_switch\nflush_patch_switch:\n\t" \ "save %sp, -0x40, %sp; save %sp, -0x40, %sp; save %sp, -0x40, %sp\n\t" \ "save %sp, -0x40, %sp; save %sp, -0x40, %sp; save %sp, -0x40, %sp\n\t" \ "save %sp, -0x40, %sp\n\t" \ "restore; restore; restore; restore; restore; restore; restore"); \ } while(0) /* Much care has gone into this code, do not touch it. * * We need to loadup regs l0/l1 for the newly forked child * case because the trap return path relies on those registers * holding certain values, gcc is told that they are clobbered. * Gcc needs registers for 3 values in and 1 value out, so we * clobber every non-fixed-usage register besides l2/l3/o4/o5. -DaveM * * Hey Dave, that do not touch sign is too much of an incentive * - Anton & Pete */ #define switch_to(prev, next, last) do { \ SWITCH_ENTER(prev); \ SWITCH_DO_LAZY_FPU(next); \ cpumask_set_cpu(smp_processor_id(), mm_cpumask(next->active_mm)); \ __asm__ __volatile__( \ "sethi %%hi(here - 0x8), %%o7\n\t" \ "mov %%g6, %%g3\n\t" \ "or %%o7, %%lo(here - 0x8), %%o7\n\t" \ "rd %%psr, %%g4\n\t" \ "std %%sp, [%%g6 + %4]\n\t" \ "rd %%wim, %%g5\n\t" \ "wr %%g4, 0x20, %%psr\n\t" \ "nop\n\t" \ "std %%g4, [%%g6 + %3]\n\t" \ "ldd [%2 + %3], %%g4\n\t" \ "mov %2, %%g6\n\t" \ ".globl patchme_store_new_current\n" \ "patchme_store_new_current:\n\t" \ "st %2, [%1]\n\t" \ "wr %%g4, 0x20, %%psr\n\t" \ "nop\n\t" \ "nop\n\t" \ "nop\n\t" /* LEON needs all 3 nops: load to %sp depends on CWP. */ \ "ldd [%%g6 + %4], %%sp\n\t" \ "wr %%g5, 0x0, %%wim\n\t" \ "ldd [%%sp + 0x00], %%l0\n\t" \ "ldd [%%sp + 0x38], %%i6\n\t" \ "wr %%g4, 0x0, %%psr\n\t" \ "nop\n\t" \ "nop\n\t" \ "jmpl %%o7 + 0x8, %%g0\n\t" \ " ld [%%g3 + %5], %0\n\t" \ "here:\n" \ : "=&r" (last) \ : "r" (&(current_set[hard_smp_processor_id()])), \ "r" (task_thread_info(next)), \ "i" (TI_KPSR), \ "i" (TI_KSP), \ "i" (TI_TASK) \ : "g1", "g2", "g3", "g4", "g5", "g7", \ "l0", "l1", "l3", "l4", "l5", "l6", "l7", \ "i0", "i1", "i2", "i3", "i4", "i5", \ "o0", "o1", "o2", "o3", "o7"); \ } while(0) void fpsave(unsigned long *fpregs, unsigned long *fsr, void *fpqueue, unsigned long *fpqdepth); void synchronize_user_stack(void); #endif /* __SPARC_SWITCH_TO_H */
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
Kbuild | File | 491 B | 0644 |
|
agp.h | File | 434 B | 0644 |
|
apb.h | File | 1.06 KB | 0644 |
|
asm-offsets.h | File | 35 B | 0644 |
|
asm-prototypes.h | File | 727 B | 0644 |
|
asm.h | File | 1.08 KB | 0644 |
|
asmmacro.h | File | 1.16 KB | 0644 |
|
atomic.h | File | 219 B | 0644 |
|
atomic_32.h | File | 2.26 KB | 0644 |
|
atomic_64.h | File | 3.34 KB | 0644 |
|
auxio.h | File | 310 B | 0644 |
|
auxio_32.h | File | 2.55 KB | 0644 |
|
auxio_64.h | File | 3.18 KB | 0644 |
|
backoff.h | File | 2.7 KB | 0644 |
|
barrier.h | File | 223 B | 0644 |
|
barrier_32.h | File | 160 B | 0644 |
|
barrier_64.h | File | 1.96 KB | 0644 |
|
bbc.h | File | 9.76 KB | 0644 |
|
bitext.h | File | 631 B | 0644 |
|
bitops.h | File | 219 B | 0644 |
|
bitops_32.h | File | 2.79 KB | 0644 |
|
bitops_64.h | File | 1.64 KB | 0644 |
|
btext.h | File | 145 B | 0644 |
|
bug.h | File | 588 B | 0644 |
|
bugs.h | File | 404 B | 0644 |
|
cache.h | File | 649 B | 0644 |
|
cacheflush.h | File | 373 B | 0644 |
|
cacheflush_32.h | File | 1.97 KB | 0644 |
|
cacheflush_64.h | File | 2.56 KB | 0644 |
|
cachetlb_32.h | File | 882 B | 0644 |
|
chafsr.h | File | 9.48 KB | 0644 |
|
checksum.h | File | 227 B | 0644 |
|
checksum_32.h | File | 6.81 KB | 0644 |
|
checksum_64.h | File | 4.4 KB | 0644 |
|
chmctrl.h | File | 7.91 KB | 0644 |
|
clock.h | File | 231 B | 0644 |
|
clocksource.h | File | 407 B | 0644 |
|
cmpxchg.h | File | 223 B | 0644 |
|
cmpxchg_32.h | File | 2.4 KB | 0644 |
|
cmpxchg_64.h | File | 5.13 KB | 0644 |
|
compat.h | File | 6.45 KB | 0644 |
|
compat_signal.h | File | 565 B | 0644 |
|
contregs.h | File | 1.9 KB | 0644 |
|
cpu_type.h | File | 579 B | 0644 |
|
cpudata.h | File | 378 B | 0644 |
|
cpudata_32.h | File | 729 B | 0644 |
|
cpudata_64.h | File | 1.13 KB | 0644 |
|
current.h | File | 991 B | 0644 |
|
dcr.h | File | 728 B | 0644 |
|
dcu.h | File | 1.48 KB | 0644 |
|
delay.h | File | 215 B | 0644 |
|
delay_32.h | File | 907 B | 0644 |
|
delay_64.h | File | 403 B | 0644 |
|
device.h | File | 565 B | 0644 |
|
dma-mapping.h | File | 632 B | 0644 |
|
dma.h | File | 6.6 KB | 0644 |
|
ebus_dma.h | File | 1.07 KB | 0644 |
|
ecc.h | File | 4.34 KB | 0644 |
|
eeprom.h | File | 254 B | 0644 |
|
elf.h | File | 207 B | 0644 |
|
elf_32.h | File | 3.19 KB | 0644 |
|
elf_64.h | File | 6.47 KB | 0644 |
|
estate.h | File | 2.23 KB | 0644 |
|
extable_64.h | File | 727 B | 0644 |
|
fb.h | File | 680 B | 0644 |
|
fbio.h | File | 2.26 KB | 0644 |
|
fhc.h | File | 4.43 KB | 0644 |
|
floppy.h | File | 219 B | 0644 |
|
floppy_32.h | File | 9.74 KB | 0644 |
|
floppy_64.h | File | 18.83 KB | 0644 |
|
fpumacro.h | File | 710 B | 0644 |
|
ftrace.h | File | 800 B | 0644 |
|
futex.h | File | 215 B | 0644 |
|
futex_32.h | File | 82 B | 0644 |
|
futex_64.h | File | 2.15 KB | 0644 |
|
hardirq.h | File | 223 B | 0644 |
|
hardirq_32.h | File | 334 B | 0644 |
|
hardirq_64.h | File | 417 B | 0644 |
|
head.h | File | 211 B | 0644 |
|
head_32.h | File | 2.56 KB | 0644 |
|
head_64.h | File | 2.13 KB | 0644 |
|
hibernate.h | File | 421 B | 0644 |
|
highmem.h | File | 2.02 KB | 0644 |
|
hugetlb.h | File | 2.09 KB | 0644 |
|
hvtramp.h | File | 782 B | 0644 |
|
hw_irq.h | File | 88 B | 0644 |
|
hypervisor.h | File | 110.71 KB | 0644 |
|
ide.h | File | 2.19 KB | 0644 |
|
idprom.h | File | 656 B | 0644 |
|
intr_queue.h | File | 794 B | 0644 |
|
io-unit.h | File | 2.41 KB | 0644 |
|
io.h | File | 620 B | 0644 |
|
io_32.h | File | 3.51 KB | 0644 |
|
io_64.h | File | 10.66 KB | 0644 |
|
ioctls.h | File | 358 B | 0644 |
|
iommu.h | File | 215 B | 0644 |
|
iommu_32.h | File | 5.73 KB | 0644 |
|
iommu_64.h | File | 2.43 KB | 0644 |
|
irq.h | File | 207 B | 0644 |
|
irq_32.h | File | 526 B | 0644 |
|
irq_64.h | File | 3.06 KB | 0644 |
|
irqflags.h | File | 227 B | 0644 |
|
irqflags_32.h | File | 1.03 KB | 0644 |
|
irqflags_64.h | File | 1.91 KB | 0644 |
|
jump_label.h | File | 1.01 KB | 0644 |
|
kdebug.h | File | 219 B | 0644 |
|
kdebug_32.h | File | 1.99 KB | 0644 |
|
kdebug_64.h | File | 393 B | 0644 |
|
kgdb.h | File | 1014 B | 0644 |
|
kmap_types.h | File | 233 B | 0644 |
|
kprobes.h | File | 1.41 KB | 0644 |
|
ldc.h | File | 4.37 KB | 0644 |
|
leon.h | File | 7.37 KB | 0644 |
|
leon_amba.h | File | 8.09 KB | 0644 |
|
leon_pci.h | File | 512 B | 0644 |
|
lsu.h | File | 1.04 KB | 0644 |
|
machines.h | File | 1.5 KB | 0644 |
|
mbus.h | File | 2.93 KB | 0644 |
|
mc146818rtc.h | File | 298 B | 0644 |
|
mc146818rtc_32.h | File | 699 B | 0644 |
|
mc146818rtc_64.h | File | 689 B | 0644 |
|
mdesc.h | File | 2.99 KB | 0644 |
|
memctrl.h | File | 311 B | 0644 |
|
mman.h | File | 304 B | 0644 |
|
mmu.h | File | 207 B | 0644 |
|
mmu_32.h | File | 209 B | 0644 |
|
mmu_64.h | File | 3.14 KB | 0644 |
|
mmu_context.h | File | 239 B | 0644 |
|
mmu_context_32.h | File | 1.07 KB | 0644 |
|
mmu_context_64.h | File | 4.15 KB | 0644 |
|
mmzone.h | File | 393 B | 0644 |
|
msi.h | File | 774 B | 0644 |
|
mxcc.h | File | 4.33 KB | 0644 |
|
nmi.h | File | 354 B | 0644 |
|
ns87303.h | File | 3.22 KB | 0644 |
|
obio.h | File | 6.26 KB | 0644 |
|
openprom.h | File | 7.3 KB | 0644 |
|
oplib.h | File | 215 B | 0644 |
|
oplib_32.h | File | 5.92 KB | 0644 |
|
oplib_64.h | File | 8.12 KB | 0644 |
|
page.h | File | 274 B | 0644 |
|
page_32.h | File | 3.91 KB | 0644 |
|
page_64.h | File | 4.49 KB | 0644 |
|
parport.h | File | 5.68 KB | 0644 |
|
pbm.h | File | 1.47 KB | 0644 |
|
pci.h | File | 207 B | 0644 |
|
pci_32.h | File | 1.09 KB | 0644 |
|
pci_64.h | File | 1.49 KB | 0644 |
|
pcic.h | File | 5.77 KB | 0644 |
|
pcr.h | File | 1.85 KB | 0644 |
|
percpu.h | File | 219 B | 0644 |
|
percpu_32.h | File | 168 B | 0644 |
|
percpu_64.h | File | 515 B | 0644 |
|
perf_event.h | File | 802 B | 0644 |
|
pgalloc.h | File | 223 B | 0644 |
|
pgalloc_32.h | File | 1.91 KB | 0644 |
|
pgalloc_64.h | File | 2.85 KB | 0644 |
|
pgtable.h | File | 223 B | 0644 |
|
pgtable_32.h | File | 11.35 KB | 0644 |
|
pgtable_64.h | File | 30.71 KB | 0644 |
|
pgtsrmmu.h | File | 6.05 KB | 0644 |
|
pil.h | File | 1.08 KB | 0644 |
|
processor.h | File | 231 B | 0644 |
|
processor_32.h | File | 3.13 KB | 0644 |
|
processor_64.h | File | 7.58 KB | 0644 |
|
prom.h | File | 2.02 KB | 0644 |
|
psr.h | File | 1.38 KB | 0644 |
|
ptrace.h | File | 4.19 KB | 0644 |
|
qrwlock.h | File | 205 B | 0644 |
|
qspinlock.h | File | 215 B | 0644 |
|
ross.h | File | 5.52 KB | 0644 |
|
sbi.h | File | 3.34 KB | 0644 |
|
scratchpad.h | File | 547 B | 0644 |
|
seccomp.h | File | 225 B | 0644 |
|
sections.h | File | 289 B | 0644 |
|
setup.h | File | 1.52 KB | 0644 |
|
sfafsr.h | File | 3.14 KB | 0644 |
|
sfp-machine.h | File | 239 B | 0644 |
|
sfp-machine_32.h | File | 6.79 KB | 0644 |
|
sfp-machine_64.h | File | 3.1 KB | 0644 |
|
shmparam.h | File | 227 B | 0644 |
|
shmparam_32.h | File | 253 B | 0644 |
|
shmparam_64.h | File | 306 B | 0644 |
|
sigcontext.h | File | 2.55 KB | 0644 |
|
signal.h | File | 835 B | 0644 |
|
smp.h | File | 207 B | 0644 |
|
smp_32.h | File | 3.29 KB | 0644 |
|
smp_64.h | File | 1.84 KB | 0644 |
|
sparsemem.h | File | 349 B | 0644 |
|
spinlock.h | File | 227 B | 0644 |
|
spinlock_32.h | File | 4.22 KB | 0644 |
|
spinlock_64.h | File | 409 B | 0644 |
|
spinlock_types.h | File | 549 B | 0644 |
|
spitfire.h | File | 9.73 KB | 0644 |
|
stacktrace.h | File | 166 B | 0644 |
|
starfire.h | File | 418 B | 0644 |
|
string.h | File | 1.13 KB | 0644 |
|
string_32.h | File | 405 B | 0644 |
|
string_64.h | File | 505 B | 0644 |
|
sunbpp.h | File | 3.27 KB | 0644 |
|
swift.h | File | 3.07 KB | 0644 |
|
switch_to.h | File | 231 B | 0644 |
|
switch_to_32.h | File | 3.53 KB | 0644 |
|
switch_to_64.h | File | 2.58 KB | 0644 |
|
syscall.h | File | 3.41 KB | 0644 |
|
syscalls.h | File | 307 B | 0644 |
|
termbits.h | File | 198 B | 0644 |
|
termios.h | File | 4.94 KB | 0644 |
|
thread_info.h | File | 239 B | 0644 |
|
thread_info_32.h | File | 3.66 KB | 0644 |
|
thread_info_64.h | File | 7.84 KB | 0644 |
|
timer.h | File | 215 B | 0644 |
|
timer_32.h | File | 1.18 KB | 0644 |
|
timer_64.h | File | 2.37 KB | 0644 |
|
timex.h | File | 215 B | 0644 |
|
timex_32.h | File | 266 B | 0644 |
|
timex_64.h | File | 423 B | 0644 |
|
tlb.h | File | 207 B | 0644 |
|
tlb_32.h | File | 520 B | 0644 |
|
tlb_64.h | File | 913 B | 0644 |
|
tlbflush.h | File | 227 B | 0644 |
|
tlbflush_32.h | File | 621 B | 0644 |
|
tlbflush_64.h | File | 1.73 KB | 0644 |
|
topology.h | File | 227 B | 0644 |
|
topology_32.h | File | 170 B | 0644 |
|
topology_64.h | File | 1.51 KB | 0644 |
|
trap_block.h | File | 6.51 KB | 0644 |
|
traps.h | File | 577 B | 0644 |
|
tsb.h | File | 12.17 KB | 0644 |
|
tsunami.h | File | 1.85 KB | 0644 |
|
ttable.h | File | 20.08 KB | 0644 |
|
turbosparc.h | File | 3.78 KB | 0644 |
|
uaccess.h | File | 363 B | 0644 |
|
uaccess_32.h | File | 8.31 KB | 0644 |
|
uaccess_64.h | File | 6.05 KB | 0644 |
|
unaligned.h | File | 339 B | 0644 |
|
unistd.h | File | 1.37 KB | 0644 |
|
upa.h | File | 3.72 KB | 0644 |
|
uprobes.h | File | 1.86 KB | 0644 |
|
user.h | File | 102 B | 0644 |
|
vaddrs.h | File | 2.02 KB | 0644 |
|
vdso.h | File | 662 B | 0644 |
|
vga.h | File | 964 B | 0644 |
|
viking.h | File | 8.14 KB | 0644 |
|
vio.h | File | 11.81 KB | 0644 |
|
visasm.h | File | 1.51 KB | 0644 |
|
vvar.h | File | 1.52 KB | 0644 |
|
winmacro.h | File | 4.66 KB | 0644 |
|
xor.h | File | 207 B | 0644 |
|
xor_32.h | File | 7.31 KB | 0644 |
|
xor_64.h | File | 2.5 KB | 0644 |
|