summaryrefslogtreecommitdiff
path: root/arch/s390/kernel/sclp.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/kernel/sclp.c')
-rw-r--r--arch/s390/kernel/sclp.c196
1 files changed, 0 insertions, 196 deletions
diff --git a/arch/s390/kernel/sclp.c b/arch/s390/kernel/sclp.c
deleted file mode 100644
index f08af675f36f..000000000000
--- a/arch/s390/kernel/sclp.c
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
- * Copyright IBM Corp. 2015
- * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
- */
-#include <linux/kernel.h>
-#include <asm/ebcdic.h>
-#include <asm/irq.h>
-#include <asm/lowcore.h>
-#include <asm/processor.h>
-#include <asm/sclp.h>
-
-#define EVTYP_VT220MSG_MASK 0x00000040
-#define EVTYP_MSG_MASK 0x40000000
-
-static char _sclp_work_area[4096] __aligned(PAGE_SIZE) __section(data);
-static bool have_vt220 __section(data);
-static bool have_linemode __section(data);
-
-static void _sclp_wait_int(void)
-{
- unsigned long cr0, cr0_new, psw_mask, addr;
- psw_t psw_ext_save, psw_wait;
-
- __ctl_store(cr0, 0, 0);
- cr0_new = cr0 | 0x200;
- __ctl_load(cr0_new, 0, 0);
-
- psw_ext_save = S390_lowcore.external_new_psw;
- psw_mask = __extract_psw();
- S390_lowcore.external_new_psw.mask = psw_mask;
- psw_wait.mask = psw_mask | PSW_MASK_EXT | PSW_MASK_WAIT;
- S390_lowcore.ext_int_code = 0;
-
- do {
- asm volatile(
- " larl %[addr],0f\n"
- " stg %[addr],%[psw_wait_addr]\n"
- " stg %[addr],%[psw_ext_addr]\n"
- " lpswe %[psw_wait]\n"
- "0:\n"
- : [addr] "=&d" (addr),
- [psw_wait_addr] "=Q" (psw_wait.addr),
- [psw_ext_addr] "=Q" (S390_lowcore.external_new_psw.addr)
- : [psw_wait] "Q" (psw_wait)
- : "cc", "memory");
- } while (S390_lowcore.ext_int_code != EXT_IRQ_SERVICE_SIG);
-
- __ctl_load(cr0, 0, 0);
- S390_lowcore.external_new_psw = psw_ext_save;
-}
-
-static int _sclp_servc(unsigned int cmd, char *sccb)
-{
- unsigned int cc;
-
- do {
- asm volatile(
- " .insn rre,0xb2200000,%1,%2\n"
- " ipm %0\n"
- : "=d" (cc) : "d" (cmd), "a" (sccb)
- : "cc", "memory");
- cc >>= 28;
- if (cc == 3)
- return -EINVAL;
- _sclp_wait_int();
- } while (cc != 0);
- return (*(unsigned short *)(sccb + 6) == 0x20) ? 0 : -EIO;
-}
-
-static int _sclp_setup(int disable)
-{
- static unsigned char init_sccb[] = {
- 0x00, 0x1c,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x04,
- 0x80, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
- };
- unsigned int *masks;
- int rc;
-
- memcpy(_sclp_work_area, init_sccb, 28);
- masks = (unsigned int *)(_sclp_work_area + 12);
- if (disable)
- memset(masks, 0, 16);
- /* SCLP write mask */
- rc = _sclp_servc(0x00780005, _sclp_work_area);
- if (rc)
- return rc;
- have_vt220 = masks[2] & EVTYP_VT220MSG_MASK;
- have_linemode = masks[2] & EVTYP_MSG_MASK;
- return 0;
-}
-
-/* Output multi-line text using SCLP Message interface. */
-static void _sclp_print_lm(const char *str)
-{
- static unsigned char write_head[] = {
- /* sccb header */
- 0x00, 0x52, /* 0 */
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 2 */
- /* evbuf */
- 0x00, 0x4a, /* 8 */
- 0x02, 0x00, 0x00, 0x00, /* 10 */
- /* mdb */
- 0x00, 0x44, /* 14 */
- 0x00, 0x01, /* 16 */
- 0xd4, 0xc4, 0xc2, 0x40, /* 18 */
- 0x00, 0x00, 0x00, 0x01, /* 22 */
- /* go */
- 0x00, 0x38, /* 26 */
- 0x00, 0x01, /* 28 */
- 0x00, 0x00, 0x00, 0x00, /* 30 */
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 34 */
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 42 */
- 0x00, 0x00, 0x00, 0x00, /* 50 */
- 0x00, 0x00, /* 54 */
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 56 */
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 64 */
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 72 */
- 0x00, 0x00, /* 80 */
- };
- static unsigned char write_mto[] = {
- /* mto */
- 0x00, 0x0a, /* 0 */
- 0x00, 0x04, /* 2 */
- 0x10, 0x00, /* 4 */
- 0x00, 0x00, 0x00, 0x00 /* 6 */
- };
- unsigned char *ptr, ch;
- unsigned int count;
-
- memcpy(_sclp_work_area, write_head, sizeof(write_head));
- ptr = _sclp_work_area + sizeof(write_head);
- do {
- memcpy(ptr, write_mto, sizeof(write_mto));
- for (count = sizeof(write_mto); (ch = *str++) != 0; count++) {
- if (ch == 0x0a)
- break;
- ptr[count] = _ascebc[ch];
- }
- /* Update length fields in mto, mdb, evbuf and sccb */
- *(unsigned short *) ptr = count;
- *(unsigned short *)(_sclp_work_area + 14) += count;
- *(unsigned short *)(_sclp_work_area + 8) += count;
- *(unsigned short *)(_sclp_work_area + 0) += count;
- ptr += count;
- } while (ch != 0);
-
- /* SCLP write data */
- _sclp_servc(0x00760005, _sclp_work_area);
-}
-
-/* Output multi-line text (plus a newline) using SCLP VT220
- * interface.
- */
-static void _sclp_print_vt220(const char *str)
-{
- static unsigned char const write_head[] = {
- /* sccb header */
- 0x00, 0x0e,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- /* evbuf header */
- 0x00, 0x06,
- 0x1a, 0x00, 0x00, 0x00,
- };
- size_t len = strlen(str);
-
- if (sizeof(write_head) + len >= sizeof(_sclp_work_area))
- len = sizeof(_sclp_work_area) - sizeof(write_head) - 1;
-
- memcpy(_sclp_work_area, write_head, sizeof(write_head));
- memcpy(_sclp_work_area + sizeof(write_head), str, len);
- _sclp_work_area[sizeof(write_head) + len] = '\n';
-
- /* Update length fields in evbuf and sccb headers */
- *(unsigned short *)(_sclp_work_area + 8) += len + 1;
- *(unsigned short *)(_sclp_work_area + 0) += len + 1;
-
- /* SCLP write data */
- (void)_sclp_servc(0x00760005, _sclp_work_area);
-}
-
-/* Output one or more lines of text on the SCLP console (VT220 and /
- * or line-mode). All lines get terminated; no need for a trailing LF.
- */
-void _sclp_print_early(const char *str)
-{
- if (_sclp_setup(0) != 0)
- return;
- if (have_linemode)
- _sclp_print_lm(str);
- if (have_vt220)
- _sclp_print_vt220(str);
- _sclp_setup(1);
-}