eb546195a7
Use sigp order code defines in assembly code as well. With this change all places that use sigp constants should have been converted to use self describing defines instead of directly using constants. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
121 lines
3.0 KiB
ArmAsm
121 lines
3.0 KiB
ArmAsm
/*
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* arch/s390/kernel/relocate_kernel.S
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*
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* (C) 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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* %r10 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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stctl %c0,%c15,ctlregs-.base(%r13)
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stm %r0,%r15,gprregs-.base(%r13)
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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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mvc 0x68(8,%r0),0(%r1)
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la %r0,.back_pgm-.base(%r13)
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st %r0,0x6c(%r0)
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oi 0x6c(%r0),0x80
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lhi %r0,0
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diag %r0,%r0,0x308
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.back:
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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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lctl %c0,%c15,ctlregs-.back_base(%r13)
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lm %r0,%r15,gprregs-.back_base(%r13)
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j .start_reloc
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.back_pgm:
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lm %r0,%r15,gprregs-.base(%r13)
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.start_reloc:
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lhi %r10,-1 # preparing the mask
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sll %r10,12 # shift it such that it becomes 0xf000
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.top:
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lhi %r7,4096 # load PAGE_SIZE in r7
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lhi %r9,4096 # load PAGE_SIZE in r9
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l %r5,0(%r2) # read another word for indirection page
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ahi %r2,4 # 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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lr %r6,%r5 # r6 = r5
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nr %r6,%r10 # 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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nr %r5,%r10 # YES, mask out,
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lr %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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lr %r8,%r5 # r8 = r5
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nr %r8,%r10 # 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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sr %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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sr %r1,%r1 # clear %r1
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sr %r2,%r2 # clear %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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.long 0
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.endr
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gprregs:
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.rept 16
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.long 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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