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| author | Jason J. Herne <jjherne@linux.ibm.com> | 2019-04-04 10:34:27 -0400 |
|---|---|---|
| committer | Thomas Huth <thuth@redhat.com> | 2019-04-12 12:40:35 +0200 |
| commit | 3083a1bbb8716e9052fe375f68f330107ee13127 (patch) | |
| tree | a249bbb5b1e28741d932036844e238244afbadf2 /pc-bios/s390-ccw/start.S | |
| parent | 1fb3e5cde8dcd9b5917aea9a0b2918e16be8be1e (diff) | |
| download | qemu-3083a1bbb8716e9052fe375f68f330107ee13127.zip qemu-3083a1bbb8716e9052fe375f68f330107ee13127.tar.gz qemu-3083a1bbb8716e9052fe375f68f330107ee13127.tar.bz2 | |
s390-bios: Support for running format-0/1 channel programs
Introduce a library function for executing format-0 and format-1
channel programs and waiting for their completion before continuing
execution.
Add cu_type() to channel io library. This will be used to query control
unit type which is used to determine if we are booting a virtio device or a
real dasd device.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Message-Id: <1554388475-18329-9-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Diffstat (limited to 'pc-bios/s390-ccw/start.S')
| -rw-r--r-- | pc-bios/s390-ccw/start.S | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/pc-bios/s390-ccw/start.S b/pc-bios/s390-ccw/start.S index 5c22cb0..aa8fceb 100644 --- a/pc-bios/s390-ccw/start.S +++ b/pc-bios/s390-ccw/start.S @@ -71,6 +71,26 @@ consume_sclp_int: larl %r1, enabled_wait_psw lpswe 0(%r1) +/* + * void consume_io_int(void) + * + * eats one I/O interrupt + */ + .globl consume_io_int +consume_io_int: + /* enable I/O interrupts in cr6 */ + stctg %c6,%c6,0(%r15) + oi 4(%r15), 0xff + lctlg %c6,%c6,0(%r15) + /* prepare i/o call handler */ + larl %r1, io_new_code + stg %r1, 0x1f8 + larl %r1, io_new_mask + mvc 0x1f0(8),0(%r1) + /* load enabled wait PSW */ + larl %r1, enabled_wait_psw + lpswe 0(%r1) + external_new_code: /* disable service interrupts in cr0 */ stctg %c0,%c0,0(%r15) @@ -78,6 +98,13 @@ external_new_code: lctlg %c0,%c0,0(%r15) br %r14 +io_new_code: + /* disable I/O interrupts in cr6 */ + stctg %c6,%c6,0(%r15) + ni 4(%r15), 0x00 + lctlg %c6,%c6,0(%r15) + br %r14 + .align 8 disabled_wait_psw: .quad 0x0002000180000000,0x0000000000000000 @@ -85,3 +112,5 @@ enabled_wait_psw: .quad 0x0302000180000000,0x0000000000000000 external_new_mask: .quad 0x0000000180000000 +io_new_mask: + .quad 0x0000000180000000 |