^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * SCLP early driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright IBM Corp. 2013
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #define KMSG_COMPONENT "sclp_early"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/ctl_reg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/sclp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/ipl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "sclp_sdias.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "sclp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static struct sclp_ipl_info sclp_ipl_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct sclp_info sclp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) EXPORT_SYMBOL(sclp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct sclp_core_entry *cpue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) u16 boot_cpu_address, cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) if (sclp_early_get_info(sccb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) sclp.facilities = sccb->facilities;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) sclp.has_sprp = !!(sccb->fac84 & 0x02);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) sclp.has_core_type = !!(sccb->fac84 & 0x01);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) sclp.has_gsls = !!(sccb->fac85 & 0x80);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) sclp.has_64bscao = !!(sccb->fac116 & 0x80);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) sclp.has_cmma = !!(sccb->fac116 & 0x40);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) sclp.has_esca = !!(sccb->fac116 & 0x08);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) sclp.has_pfmfi = !!(sccb->fac117 & 0x40);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) sclp.has_ibs = !!(sccb->fac117 & 0x20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) sclp.has_gisaf = !!(sccb->fac118 & 0x08);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) sclp.has_hvs = !!(sccb->fac119 & 0x80);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) sclp.has_kss = !!(sccb->fac98 & 0x01);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (sccb->fac85 & 0x02)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (sccb->fac91 & 0x40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_GUEST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if (sccb->cpuoff > 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) sclp.has_diag318 = !!(sccb->byte_134 & 0x80);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (sccb->cpuoff > 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) sclp.has_sipl = !!(sccb->cbl & 0x4000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) sclp.rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) sclp.rzm <<= 20;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) sclp.ibc = sccb->ibc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (sccb->hamaxpow && sccb->hamaxpow < 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) sclp.hamax = (1UL << sccb->hamaxpow) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) sclp.hamax = U64_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (!sccb->hcpua) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (MACHINE_IS_VM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) sclp.max_cores = 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) sclp.max_cores = sccb->ncpurl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) sclp.max_cores = sccb->hcpua + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) boot_cpu_address = stap();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) cpue = (void *)sccb + sccb->cpuoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) for (cpu = 0; cpu < sccb->ncpurl; cpue++, cpu++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (boot_cpu_address != cpue->core_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) sclp.has_siif = cpue->siif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) sclp.has_sigpif = cpue->sigpif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) sclp.has_sief2 = cpue->sief2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) sclp.has_gpere = cpue->gpere;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) sclp.has_ib = cpue->ib;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) sclp.has_cei = cpue->cei;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) sclp.has_skey = cpue->skey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /* Save IPL information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) sclp_ipl_info.is_valid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (sccb->fac91 & 0x2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) sclp_ipl_info.has_dump = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) memcpy(&sclp_ipl_info.loadparm, &sccb->loadparm, LOADPARM_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (sccb->hsa_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) sclp.hsa_size = (sccb->hsa_size - 1) * PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) sclp.mtid = (sccb->fac42 & 0x80) ? (sccb->fac42 & 31) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) sclp.mtid_cp = (sccb->fac42 & 0x80) ? (sccb->fac43 & 31) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) sclp.mtid_prev = (sccb->fac42 & 0x80) ? (sccb->fac66 & 31) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) sclp.hmfai = sccb->hmfai;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) sclp.has_dirq = !!(sccb->cpudirq & 0x80);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * This function will be called after sclp_early_facilities_detect(), which gets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * called from early.c code. The sclp_early_facilities_detect() function retrieves
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * and saves the IPL information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) void __init sclp_early_get_ipl_info(struct sclp_ipl_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) *info = sclp_ipl_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static struct sclp_core_info sclp_early_core_info __initdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static int sclp_early_core_info_valid __initdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static void __init sclp_early_init_core_info(struct read_cpu_info_sccb *sccb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (!SCLP_HAS_CPU_INFO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) memset(sccb, 0, sizeof(*sccb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) sccb->header.length = sizeof(*sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (sclp_early_cmd(SCLP_CMDW_READ_CPU_INFO, sccb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (sccb->header.response_code != 0x0010)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) sclp_fill_core_info(&sclp_early_core_info, sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) sclp_early_core_info_valid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) int __init sclp_early_get_core_info(struct sclp_core_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (!sclp_early_core_info_valid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) *info = sclp_early_core_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static void __init sclp_early_console_detect(struct init_sccb *sccb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (sccb->header.response_code != 0x20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (sclp_early_con_check_vt220(sccb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) sclp.has_vt220 = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (sclp_early_con_check_linemode(sccb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) sclp.has_linemode = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) void __init sclp_early_detect(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) void *sccb = sclp_early_sccb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) sclp_early_facilities_detect(sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) sclp_early_init_core_info(sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * Turn off SCLP event notifications. Also save remote masks in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * sccb. These are sufficient to detect sclp console capabilities.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) sclp_early_set_event_mask(sccb, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) sclp_early_console_detect(sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags