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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100/* SPDX-License-Identifier: GPL-2.0 *//* * arch/alpha/kernel/head.S * * initial boot stuff.. At this point, the bootloader has already * switched into OSF/1 PAL-code, and loaded us at the correct address * (START_ADDR). So there isn't much left for us to do: just set up * the kernel global pointer and jump to the kernel entry-point. */
#include <linux/init.h>#include <asm/asm-offsets.h>#include <asm/pal.h>#include <asm/setup.h>
__HEAD.globl _stext .set noreorder .globl __start .ent __start_stext:__start: .prologue 0 br $27,1f1: ldgp $29,0($27) /* We need to get current_task_info loaded up... */ lda $8,init_thread_union /* ... and find our stack ... */ lda $30,0x4000 - SIZEOF_PT_REGS($8) /* ... and then we can start the kernel. */ jsr $26,start_kernel call_pal PAL_halt .end __start
#ifdef CONFIG_SMP .align 3 .globl __smp_callin .ent __smp_callin /* On entry here from SRM console, the HWPCB of the per-cpu slot for this processor has been loaded. We've arranged for the UNIQUE value for this process to contain the PCBB of the target idle task. */__smp_callin: .prologue 1 ldgp $29,0($27) # First order of business, load the GP.
call_pal PAL_rduniq # Grab the target PCBB. mov $0,$16 # Install it. call_pal PAL_swpctx
lda $8,0x3fff # Find "current". bic $30,$8,$8 jsr $26,smp_callin call_pal PAL_halt .end __smp_callin#endif /* CONFIG_SMP */
# # The following two functions are needed for supporting SRM PALcode # on the PC164 (at least), since that PALcode manages the interrupt # masking, and we cannot duplicate the effort without causing problems #
.align 3 .globl cserve_ena .ent cserve_enacserve_ena: .prologue 0 bis $16,$16,$17 lda $16,52($31) call_pal PAL_cserve ret ($26) .end cserve_ena
.align 3 .globl cserve_dis .ent cserve_discserve_dis: .prologue 0 bis $16,$16,$17 lda $16,53($31) call_pal PAL_cserve ret ($26) .end cserve_dis
# # It is handy, on occasion, to make halt actually just loop. # Putting it here means we dont have to recompile the whole # kernel. #
.align 3 .globl halt .ent halthalt: .prologue 0 call_pal PAL_halt .end halt