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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 18:32:14 +07:00
5d36aa9bbe
Add a dummy nop at the end of _start() to maintain the invariant that the return-pointer (rp) always point to the calling function. This makes unwinding stop at the last frame, as it should. Signed-off-by: David Mosberger-Tang <dmosberger@gmail.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
165 lines
3.9 KiB
ArmAsm
165 lines
3.9 KiB
ArmAsm
/*
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* Copyright (C) 1998-2003 Hewlett-Packard Co
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* David Mosberger-Tang <davidm@hpl.hp.com>
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*/
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#include <asm/asmmacro.h>
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#include <asm/pal.h>
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.bss
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.align 16
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stack_mem:
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.skip 16834
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.text
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/* This needs to be defined because lib/string.c:strlcat() calls it in case of error... */
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GLOBAL_ENTRY(printk)
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break 0
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END(printk)
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GLOBAL_ENTRY(_start)
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.prologue
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.save rp, r0
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.body
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movl gp = __gp
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movl sp = stack_mem+16384-16
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bsw.1
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br.call.sptk.many rp=start_bootloader
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0: nop 0 /* dummy nop to make unwinding work */
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END(_start)
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/*
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* Set a break point on this function so that symbols are available to set breakpoints in
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* the kernel being debugged.
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*/
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GLOBAL_ENTRY(debug_break)
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br.ret.sptk.many b0
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END(debug_break)
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GLOBAL_ENTRY(ssc)
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.regstk 5,0,0,0
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mov r15=in4
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break 0x80001
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br.ret.sptk.many b0
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END(ssc)
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GLOBAL_ENTRY(jmp_to_kernel)
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.regstk 2,0,0,0
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mov r28=in0
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mov b7=in1
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br.sptk.few b7
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END(jmp_to_kernel)
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/*
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* r28 contains the index of the PAL function
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* r29--31 the args
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* Return values in ret0--3 (r8--11)
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*/
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GLOBAL_ENTRY(pal_emulator_static)
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mov r8=-1
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mov r9=256
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;;
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cmp.gtu p6,p7=r9,r28 /* r28 <= 255? */
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(p6) br.cond.sptk.few static
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;;
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mov r9=512
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;;
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cmp.gtu p6,p7=r9,r28
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(p6) br.cond.sptk.few stacked
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;;
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static: cmp.eq p6,p7=PAL_PTCE_INFO,r28
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(p7) br.cond.sptk.few 1f
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;;
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mov r8=0 /* status = 0 */
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movl r9=0x100000000 /* tc.base */
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movl r10=0x0000000200000003 /* count[0], count[1] */
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movl r11=0x1000000000002000 /* stride[0], stride[1] */
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br.cond.sptk.few rp
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1: cmp.eq p6,p7=PAL_FREQ_RATIOS,r28
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(p7) br.cond.sptk.few 1f
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mov r8=0 /* status = 0 */
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movl r9 =0x100000064 /* proc_ratio (1/100) */
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movl r10=0x100000100 /* bus_ratio<<32 (1/256) */
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movl r11=0x100000064 /* itc_ratio<<32 (1/100) */
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;;
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1: cmp.eq p6,p7=PAL_RSE_INFO,r28
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(p7) br.cond.sptk.few 1f
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mov r8=0 /* status = 0 */
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mov r9=96 /* num phys stacked */
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mov r10=0 /* hints */
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mov r11=0
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br.cond.sptk.few rp
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1: cmp.eq p6,p7=PAL_CACHE_FLUSH,r28 /* PAL_CACHE_FLUSH */
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(p7) br.cond.sptk.few 1f
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mov r9=ar.lc
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movl r8=524288 /* flush 512k million cache lines (16MB) */
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;;
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mov ar.lc=r8
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movl r8=0xe000000000000000
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;;
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.loop: fc r8
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add r8=32,r8
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br.cloop.sptk.few .loop
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sync.i
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;;
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srlz.i
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;;
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mov ar.lc=r9
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mov r8=r0
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;;
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1: cmp.eq p6,p7=PAL_PERF_MON_INFO,r28
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(p7) br.cond.sptk.few 1f
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mov r8=0 /* status = 0 */
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movl r9 =0x08122f04 /* generic=4 width=47 retired=8 cycles=18 */
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mov r10=0 /* reserved */
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mov r11=0 /* reserved */
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mov r16=0xffff /* implemented PMC */
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mov r17=0x3ffff /* implemented PMD */
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add r18=8,r29 /* second index */
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;;
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st8 [r29]=r16,16 /* store implemented PMC */
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st8 [r18]=r0,16 /* clear remaining bits */
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;;
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st8 [r29]=r0,16 /* clear remaining bits */
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st8 [r18]=r0,16 /* clear remaining bits */
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;;
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st8 [r29]=r17,16 /* store implemented PMD */
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st8 [r18]=r0,16 /* clear remaining bits */
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mov r16=0xf0 /* cycles count capable PMC */
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;;
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st8 [r29]=r0,16 /* clear remaining bits */
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st8 [r18]=r0,16 /* clear remaining bits */
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mov r17=0xf0 /* retired bundles capable PMC */
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;;
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st8 [r29]=r16,16 /* store cycles capable */
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st8 [r18]=r0,16 /* clear remaining bits */
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;;
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st8 [r29]=r0,16 /* clear remaining bits */
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st8 [r18]=r0,16 /* clear remaining bits */
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;;
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st8 [r29]=r17,16 /* store retired bundle capable */
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st8 [r18]=r0,16 /* clear remaining bits */
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;;
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st8 [r29]=r0,16 /* clear remaining bits */
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st8 [r18]=r0,16 /* clear remaining bits */
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;;
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1: cmp.eq p6,p7=PAL_VM_SUMMARY,r28
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(p7) br.cond.sptk.few 1f
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mov r8=0 /* status = 0 */
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movl r9=0x2044040020F1865 /* num_tc_levels=2, num_unique_tcs=4 */
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/* max_itr_entry=64, max_dtr_entry=64 */
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/* hash_tag_id=2, max_pkr=15 */
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/* key_size=24, phys_add_size=50, vw=1 */
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movl r10=0x183C /* rid_size=24, impl_va_msb=60 */
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;;
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1: cmp.eq p6,p7=PAL_MEM_ATTRIB,r28
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(p7) br.cond.sptk.few 1f
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mov r8=0 /* status = 0 */
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mov r9=0x80|0x01 /* NatPage|WB */
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;;
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1: br.cond.sptk.few rp
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stacked:
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br.ret.sptk.few rp
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END(pal_emulator_static)
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