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a53c8fab3f
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
121 lines
3 KiB
ArmAsm
121 lines
3 KiB
ArmAsm
/*
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* Copyright IBM Corp. 2005
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*
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* Author(s): Rolf Adelsberger,
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* Heiko Carstens <heiko.carstens@de.ibm.com>
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*
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*/
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#include <linux/linkage.h>
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#include <asm/sigp.h>
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/*
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* moves the new kernel to its destination...
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* %r2 = pointer to first kimage_entry_t
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* %r3 = start address - where to jump to after the job is done...
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*
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* %r5 will be used as temp. storage
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* %r6 holds the destination address
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* %r7 = PAGE_SIZE
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* %r8 holds the source address
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* %r9 = PAGE_SIZE
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*
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* 0xf000 is a page_mask
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*/
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.text
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ENTRY(relocate_kernel)
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basr %r13,0 # base address
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.base:
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stnsm sys_msk-.base(%r13),0xfb # disable DAT
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stctg %c0,%c15,ctlregs-.base(%r13)
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stmg %r0,%r15,gprregs-.base(%r13)
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lghi %r0,3
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sllg %r0,%r0,31
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stg %r0,0x1d0(%r0)
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la %r0,.back_pgm-.base(%r13)
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stg %r0,0x1d8(%r0)
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la %r1,load_psw-.base(%r13)
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mvc 0(8,%r0),0(%r1)
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la %r0,.back-.base(%r13)
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st %r0,4(%r0)
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oi 4(%r0),0x80
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lghi %r0,0
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diag %r0,%r0,0x308
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.back:
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lhi %r1,1 # mode 1 = esame
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sigp %r1,%r0,SIGP_SET_ARCHITECTURE # switch to esame mode
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sam64 # switch to 64 bit addressing mode
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basr %r13,0
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.back_base:
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oi have_diag308-.back_base(%r13),0x01
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lctlg %c0,%c15,ctlregs-.back_base(%r13)
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lmg %r0,%r15,gprregs-.back_base(%r13)
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j .top
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.back_pgm:
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lmg %r0,%r15,gprregs-.base(%r13)
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.top:
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lghi %r7,4096 # load PAGE_SIZE in r7
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lghi %r9,4096 # load PAGE_SIZE in r9
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lg %r5,0(%r2) # read another word for indirection page
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aghi %r2,8 # increment pointer
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tml %r5,0x1 # is it a destination page?
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je .indir_check # NO, goto "indir_check"
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lgr %r6,%r5 # r6 = r5
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nill %r6,0xf000 # mask it out and...
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j .top # ...next iteration
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.indir_check:
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tml %r5,0x2 # is it a indirection page?
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je .done_test # NO, goto "done_test"
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nill %r5,0xf000 # YES, mask out,
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lgr %r2,%r5 # move it into the right register,
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j .top # and read next...
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.done_test:
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tml %r5,0x4 # is it the done indicator?
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je .source_test # NO! Well, then it should be the source indicator...
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j .done # ok, lets finish it here...
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.source_test:
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tml %r5,0x8 # it should be a source indicator...
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je .top # NO, ignore it...
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lgr %r8,%r5 # r8 = r5
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nill %r8,0xf000 # masking
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0: mvcle %r6,%r8,0x0 # copy PAGE_SIZE bytes from r8 to r6 - pad with 0
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jo 0b
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j .top
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.done:
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sgr %r0,%r0 # clear register r0
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la %r4,load_psw-.base(%r13) # load psw-address into the register
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o %r3,4(%r4) # or load address into psw
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st %r3,4(%r4)
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mvc 0(8,%r0),0(%r4) # copy psw to absolute address 0
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tm have_diag308-.base(%r13),0x01
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jno .no_diag308
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diag %r0,%r0,0x308
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.no_diag308:
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sam31 # 31 bit mode
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sr %r1,%r1 # erase register r1
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sr %r2,%r2 # erase register r2
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sigp %r1,%r2,SIGP_SET_ARCHITECTURE # set cpuid to zero
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lpsw 0 # hopefully start new kernel...
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.align 8
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load_psw:
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.long 0x00080000,0x80000000
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sys_msk:
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.quad 0
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ctlregs:
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.rept 16
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.quad 0
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.endr
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gprregs:
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.rept 16
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.quad 0
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.endr
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have_diag308:
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.byte 0
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.align 8
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relocate_kernel_end:
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.align 8
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.globl relocate_kernel_len
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relocate_kernel_len:
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.quad relocate_kernel_end - relocate_kernel
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