diff options
Diffstat (limited to 'arch/s390/kernel/relocate_kernel.S')
| -rw-r--r-- | arch/s390/kernel/relocate_kernel.S | 54 |
1 files changed, 4 insertions, 50 deletions
diff --git a/arch/s390/kernel/relocate_kernel.S b/arch/s390/kernel/relocate_kernel.S index 9c2c96da23d0..c97c2d40fe15 100644 --- a/arch/s390/kernel/relocate_kernel.S +++ b/arch/s390/kernel/relocate_kernel.S @@ -29,33 +29,6 @@ ENTRY(relocate_kernel) basr %r13,0 # base address .base: - stctg %c0,%c15,ctlregs-.base(%r13) - stmg %r0,%r15,gprregs-.base(%r13) - lghi %r0,3 - sllg %r0,%r0,31 - stg %r0,0x1d0(%r0) - la %r0,.back_pgm-.base(%r13) - stg %r0,0x1d8(%r0) - la %r1,load_psw-.base(%r13) - mvc 0(8,%r0),0(%r1) - la %r0,.back-.base(%r13) - st %r0,4(%r0) - oi 4(%r0),0x80 - lghi %r0,0 - diag %r0,%r0,0x308 - .back: - lhi %r1,1 # mode 1 = esame - sigp %r1,%r0,SIGP_SET_ARCHITECTURE # switch to esame mode - sam64 # switch to 64 bit addressing mode - basr %r13,0 - .back_base: - oi have_diag308-.back_base(%r13),0x01 - lctlg %c0,%c15,ctlregs-.back_base(%r13) - lmg %r0,%r15,gprregs-.back_base(%r13) - j .top - .back_pgm: - lmg %r0,%r15,gprregs-.base(%r13) - .top: lghi %r7,PAGE_SIZE # load PAGE_SIZE in r7 lghi %r9,PAGE_SIZE # load PAGE_SIZE in r9 lg %r5,0(%r2) # read another word for indirection page @@ -64,55 +37,36 @@ ENTRY(relocate_kernel) je .indir_check # NO, goto "indir_check" lgr %r6,%r5 # r6 = r5 nill %r6,0xf000 # mask it out and... - j .top # ...next iteration + j .base # ...next iteration .indir_check: tml %r5,0x2 # is it a indirection page? je .done_test # NO, goto "done_test" nill %r5,0xf000 # YES, mask out, lgr %r2,%r5 # move it into the right register, - j .top # and read next... + j .base # and read next... .done_test: tml %r5,0x4 # is it the done indicator? je .source_test # NO! Well, then it should be the source indicator... j .done # ok, lets finish it here... .source_test: tml %r5,0x8 # it should be a source indicator... - je .top # NO, ignore it... + je .base # NO, ignore it... lgr %r8,%r5 # r8 = r5 nill %r8,0xf000 # masking 0: mvcle %r6,%r8,0x0 # copy PAGE_SIZE bytes from r8 to r6 - pad with 0 jo 0b - j .top + j .base .done: sgr %r0,%r0 # clear register r0 la %r4,load_psw-.base(%r13) # load psw-address into the register o %r3,4(%r4) # or load address into psw st %r3,4(%r4) mvc 0(8,%r0),0(%r4) # copy psw to absolute address 0 - tm have_diag308-.base(%r13),0x01 - jno .no_diag308 diag %r0,%r0,0x308 - .no_diag308: - sam31 # 31 bit mode - sr %r1,%r1 # erase register r1 - sr %r2,%r2 # erase register r2 - sigp %r1,%r2,SIGP_SET_ARCHITECTURE # set cpuid to zero - lpsw 0 # hopefully start new kernel... .align 8 load_psw: .long 0x00080000,0x80000000 - ctlregs: - .rept 16 - .quad 0 - .endr - gprregs: - .rept 16 - .quad 0 - .endr - have_diag308: - .byte 0 - .align 8 relocate_kernel_end: .align 8 .globl relocate_kernel_len |