diff options
Diffstat (limited to 'arch/s390/boot/text_dma.S')
-rw-r--r-- | arch/s390/boot/text_dma.S | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/arch/s390/boot/text_dma.S b/arch/s390/boot/text_dma.S deleted file mode 100644 index 5ff5fee02801..000000000000 --- a/arch/s390/boot/text_dma.S +++ /dev/null @@ -1,156 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Code that needs to run below 2 GB. - * - * Copyright IBM Corp. 2019 - */ - -#include <linux/linkage.h> -#include <asm/errno.h> -#include <asm/sigp.h> - - .section .dma.text,"ax" -/* - * Simplified version of expoline thunk. The normal thunks can not be used here, - * because they might be more than 2 GB away, and not reachable by the relative - * branch. No comdat, exrl, etc. optimizations used here, because it only - * affects a few functions that are not performance-relevant. - */ - .macro BR_EX_DMA_r14 - larl %r1,0f - ex 0,0(%r1) - j . -0: br %r14 - .endm - -/* - * int _diag14_dma(unsigned long rx, unsigned long ry1, unsigned long subcode) - */ -ENTRY(_diag14_dma) - lgr %r1,%r2 - lgr %r2,%r3 - lgr %r3,%r4 - lhi %r5,-EIO - sam31 - diag %r1,%r2,0x14 -.Ldiag14_ex: - ipm %r5 - srl %r5,28 -.Ldiag14_fault: - sam64 - lgfr %r2,%r5 - BR_EX_DMA_r14 - EX_TABLE_DMA(.Ldiag14_ex, .Ldiag14_fault) -ENDPROC(_diag14_dma) - -/* - * int _diag210_dma(struct diag210 *addr) - */ -ENTRY(_diag210_dma) - lgr %r1,%r2 - lhi %r2,-1 - sam31 - diag %r1,%r0,0x210 -.Ldiag210_ex: - ipm %r2 - srl %r2,28 -.Ldiag210_fault: - sam64 - lgfr %r2,%r2 - BR_EX_DMA_r14 - EX_TABLE_DMA(.Ldiag210_ex, .Ldiag210_fault) -ENDPROC(_diag210_dma) - -/* - * int _diag26c_dma(void *req, void *resp, enum diag26c_sc subcode) - */ -ENTRY(_diag26c_dma) - lghi %r5,-EOPNOTSUPP - sam31 - diag %r2,%r4,0x26c -.Ldiag26c_ex: - sam64 - lgfr %r2,%r5 - BR_EX_DMA_r14 - EX_TABLE_DMA(.Ldiag26c_ex, .Ldiag26c_ex) -ENDPROC(_diag26c_dma) - -/* - * void _diag0c_dma(struct hypfs_diag0c_entry *entry) - */ -ENTRY(_diag0c_dma) - sam31 - diag %r2,%r2,0x0c - sam64 - BR_EX_DMA_r14 -ENDPROC(_diag0c_dma) - -/* - * void _diag308_reset_dma(void) - * - * Calls diag 308 subcode 1 and continues execution - */ -ENTRY(_diag308_reset_dma) - larl %r4,.Lctlregs # Save control registers - stctg %c0,%c15,0(%r4) - lg %r2,0(%r4) # Disable lowcore protection - nilh %r2,0xefff - larl %r4,.Lctlreg0 - stg %r2,0(%r4) - lctlg %c0,%c0,0(%r4) - larl %r4,.Lfpctl # Floating point control register - stfpc 0(%r4) - larl %r4,.Lprefix # Save prefix register - stpx 0(%r4) - larl %r4,.Lprefix_zero # Set prefix register to 0 - spx 0(%r4) - larl %r4,.Lcontinue_psw # Save PSW flags - epsw %r2,%r3 - stm %r2,%r3,0(%r4) - larl %r4,restart_part2 # Setup restart PSW at absolute 0 - larl %r3,.Lrestart_diag308_psw - og %r4,0(%r3) # Save PSW - lghi %r3,0 - sturg %r4,%r3 # Use sturg, because of large pages - lghi %r1,1 - lghi %r0,0 - diag %r0,%r1,0x308 -restart_part2: - lhi %r0,0 # Load r0 with zero - lhi %r1,2 # Use mode 2 = ESAME (dump) - sigp %r1,%r0,SIGP_SET_ARCHITECTURE # Switch to ESAME mode - sam64 # Switch to 64 bit addressing mode - larl %r4,.Lctlregs # Restore control registers - lctlg %c0,%c15,0(%r4) - larl %r4,.Lfpctl # Restore floating point ctl register - lfpc 0(%r4) - larl %r4,.Lprefix # Restore prefix register - spx 0(%r4) - larl %r4,.Lcontinue_psw # Restore PSW flags - lpswe 0(%r4) -.Lcontinue: - BR_EX_DMA_r14 -ENDPROC(_diag308_reset_dma) - - .section .dma.data,"aw",@progbits -.align 8 -.Lrestart_diag308_psw: - .long 0x00080000,0x80000000 - -.align 8 -.Lcontinue_psw: - .quad 0,.Lcontinue - -.align 8 -.Lctlreg0: - .quad 0 -.Lctlregs: - .rept 16 - .quad 0 - .endr -.Lfpctl: - .long 0 -.Lprefix: - .long 0 -.Lprefix_zero: - .long 0 |