s390/sclp: Move early code from sclp_cmd.c to sclp_early.c
The early SCLP driver code in sclp_cmd.c belongs to sclp_early.c because it is independent from the 'normal' SCLP driver. So move it to sclp_early.c Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Holzheu
committed by
Martin Schwidefsky
Martin Schwidefsky
parent
e657d8fe2f
commit
acf6a004e6
@@ -7,14 +7,176 @@
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#define KMSG_COMPONENT "sclp_early"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <asm/ctl_reg.h>
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#include <asm/sclp.h>
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#include <asm/ipl.h>
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#include "sclp_sdias.h"
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#include "sclp.h"
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#define SCLP_CMDW_READ_SCP_INFO 0x00020001
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#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
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struct read_info_sccb {
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struct sccb_header header; /* 0-7 */
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u16 rnmax; /* 8-9 */
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u8 rnsize; /* 10 */
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u8 _reserved0[24 - 11]; /* 11-15 */
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u8 loadparm[8]; /* 24-31 */
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u8 _reserved1[48 - 32]; /* 32-47 */
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u64 facilities; /* 48-55 */
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u8 _reserved2[84 - 56]; /* 56-83 */
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u8 fac84; /* 84 */
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u8 fac85; /* 85 */
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u8 _reserved3[91 - 86]; /* 86-90 */
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u8 flags; /* 91 */
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u8 _reserved4[100 - 92]; /* 92-99 */
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u32 rnsize2; /* 100-103 */
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u64 rnmax2; /* 104-111 */
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u8 _reserved5[4096 - 112]; /* 112-4095 */
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} __packed __aligned(PAGE_SIZE);
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static __initdata struct init_sccb early_event_mask_sccb __aligned(PAGE_SIZE);
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static __initdata struct read_info_sccb early_read_info_sccb;
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static __initdata char sccb_early[PAGE_SIZE] __aligned(PAGE_SIZE);
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static unsigned long sclp_hsa_size;
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__initdata int sclp_early_read_info_sccb_valid;
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u64 sclp_facilities;
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u8 sclp_fac84;
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unsigned long long sclp_rzm;
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unsigned long long sclp_rnmax;
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static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb)
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{
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int rc;
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__ctl_set_bit(0, 9);
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rc = sclp_service_call(cmd, sccb);
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if (rc)
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goto out;
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__load_psw_mask(PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_EA |
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PSW_MASK_BA | PSW_MASK_EXT | PSW_MASK_WAIT);
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local_irq_disable();
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out:
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/* Contents of the sccb might have changed. */
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barrier();
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__ctl_clear_bit(0, 9);
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return rc;
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}
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static void __init sclp_read_info_early(void)
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{
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int rc;
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int i;
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struct read_info_sccb *sccb;
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sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED,
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SCLP_CMDW_READ_SCP_INFO};
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sccb = &early_read_info_sccb;
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for (i = 0; i < ARRAY_SIZE(commands); i++) {
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do {
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memset(sccb, 0, sizeof(*sccb));
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sccb->header.length = sizeof(*sccb);
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sccb->header.function_code = 0x80;
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sccb->header.control_mask[2] = 0x80;
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rc = sclp_cmd_sync_early(commands[i], sccb);
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} while (rc == -EBUSY);
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if (rc)
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break;
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if (sccb->header.response_code == 0x10) {
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sclp_early_read_info_sccb_valid = 1;
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break;
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}
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if (sccb->header.response_code != 0x1f0)
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break;
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}
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}
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static void __init sclp_event_mask_early(void)
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{
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struct init_sccb *sccb = &early_event_mask_sccb;
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int rc;
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do {
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memset(sccb, 0, sizeof(*sccb));
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sccb->header.length = sizeof(*sccb);
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sccb->mask_length = sizeof(sccb_mask_t);
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rc = sclp_cmd_sync_early(SCLP_CMDW_WRITE_EVENT_MASK, sccb);
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} while (rc == -EBUSY);
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}
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void __init sclp_facilities_detect(void)
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{
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struct read_info_sccb *sccb;
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sclp_read_info_early();
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if (!sclp_early_read_info_sccb_valid)
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return;
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sccb = &early_read_info_sccb;
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sclp_facilities = sccb->facilities;
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sclp_fac84 = sccb->fac84;
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if (sccb->fac85 & 0x02)
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S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
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sclp_rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
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sclp_rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
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sclp_rzm <<= 20;
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sclp_event_mask_early();
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}
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bool __init sclp_has_linemode(void)
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{
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struct init_sccb *sccb = &early_event_mask_sccb;
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if (sccb->header.response_code != 0x20)
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return 0;
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if (!(sccb->sclp_send_mask & (EVTYP_OPCMD_MASK | EVTYP_PMSGCMD_MASK)))
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return 0;
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if (!(sccb->sclp_receive_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK)))
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return 0;
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return 1;
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}
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bool __init sclp_has_vt220(void)
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{
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struct init_sccb *sccb = &early_event_mask_sccb;
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if (sccb->header.response_code != 0x20)
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return 0;
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if (sccb->sclp_send_mask & EVTYP_VT220MSG_MASK)
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return 1;
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return 0;
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}
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unsigned long long sclp_get_rnmax(void)
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{
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return sclp_rnmax;
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}
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unsigned long long sclp_get_rzm(void)
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{
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return sclp_rzm;
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}
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/*
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* This function will be called after sclp_facilities_detect(), which gets
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* called from early.c code. Therefore the sccb should have valid contents.
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*/
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void __init sclp_get_ipl_info(struct sclp_ipl_info *info)
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{
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struct read_info_sccb *sccb;
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if (!sclp_early_read_info_sccb_valid)
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return;
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sccb = &early_read_info_sccb;
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info->is_valid = 1;
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if (sccb->flags & 0x2)
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info->has_dump = 1;
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memcpy(&info->loadparm, &sccb->loadparm, LOADPARM_LEN);
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}
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static int __init sclp_cmd_early(sclp_cmdw_t cmd, void *sccb)
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{
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int rc;
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