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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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49698745e5
To distinguish zfcpdump case and to be able to parse some of the kernel command line arguments early (e.g. mem=) ipl block retrieval and command line construction code is moved to the early boot phase. "memory_end" is set up correctly respecting "mem=" and hsa_size in case of the zfcpdump. arch/s390/boot/string.c is introduced to provide string handling and command line parsing functions to early boot phase code for the compressed kernel image case. Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
166 lines
3.3 KiB
C
166 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* s390 (re)ipl support
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*
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* Copyright IBM Corp. 2007
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*/
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#ifndef _ASM_S390_IPL_H
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#define _ASM_S390_IPL_H
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#include <asm/lowcore.h>
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#include <asm/types.h>
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#include <asm/cio.h>
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#include <asm/setup.h>
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#define NSS_NAME_SIZE 8
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#define IPL_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \
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sizeof(struct ipl_block_fcp))
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#define IPL_PARM_BLK0_FCP_LEN (sizeof(struct ipl_block_fcp) + 16)
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#define IPL_PARM_BLK_CCW_LEN (sizeof(struct ipl_list_hdr) + \
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sizeof(struct ipl_block_ccw))
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#define IPL_PARM_BLK0_CCW_LEN (sizeof(struct ipl_block_ccw) + 16)
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#define IPL_MAX_SUPPORTED_VERSION (0)
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struct ipl_list_hdr {
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u32 len;
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u8 reserved1[3];
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u8 version;
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u32 blk0_len;
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u8 pbt;
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u8 flags;
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u16 reserved2;
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u8 loadparm[8];
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} __attribute__((packed));
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struct ipl_block_fcp {
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u8 reserved1[305-1];
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u8 opt;
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u8 reserved2[3];
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u16 reserved3;
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u16 devno;
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u8 reserved4[4];
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u64 wwpn;
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u64 lun;
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u32 bootprog;
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u8 reserved5[12];
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u64 br_lba;
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u32 scp_data_len;
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u8 reserved6[260];
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u8 scp_data[];
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} __attribute__((packed));
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#define DIAG308_VMPARM_SIZE 64
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#define DIAG308_SCPDATA_SIZE (PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \
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offsetof(struct ipl_block_fcp, scp_data)))
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struct ipl_block_ccw {
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u8 reserved1[84];
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u16 reserved2 : 13;
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u8 ssid : 3;
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u16 devno;
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u8 vm_flags;
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u8 reserved3[3];
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u32 vm_parm_len;
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u8 nss_name[8];
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u8 vm_parm[DIAG308_VMPARM_SIZE];
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u8 reserved4[8];
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} __attribute__((packed));
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struct ipl_parameter_block {
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struct ipl_list_hdr hdr;
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union {
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struct ipl_block_fcp fcp;
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struct ipl_block_ccw ccw;
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char raw[PAGE_SIZE - sizeof(struct ipl_list_hdr)];
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} ipl_info;
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} __packed __aligned(PAGE_SIZE);
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struct save_area;
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struct save_area * __init save_area_alloc(bool is_boot_cpu);
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struct save_area * __init save_area_boot_cpu(void);
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void __init save_area_add_regs(struct save_area *, void *regs);
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void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
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extern void s390_reset_system(void);
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extern void ipl_store_parameters(void);
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extern size_t ipl_block_get_ascii_vmparm(char *dest, size_t size,
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const struct ipl_parameter_block *ipb);
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enum ipl_type {
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IPL_TYPE_UNKNOWN = 1,
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IPL_TYPE_CCW = 2,
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IPL_TYPE_FCP = 4,
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IPL_TYPE_FCP_DUMP = 8,
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IPL_TYPE_NSS = 16,
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};
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struct ipl_info
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{
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enum ipl_type type;
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union {
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struct {
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struct ccw_dev_id dev_id;
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} ccw;
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struct {
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struct ccw_dev_id dev_id;
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u64 wwpn;
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u64 lun;
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} fcp;
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struct {
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char name[NSS_NAME_SIZE + 1];
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} nss;
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} data;
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};
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extern struct ipl_info ipl_info;
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extern void setup_ipl(void);
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extern void set_os_info_reipl_block(void);
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/*
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* DIAG 308 support
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*/
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enum diag308_subcode {
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DIAG308_REL_HSA = 2,
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DIAG308_LOAD_CLEAR = 3,
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DIAG308_LOAD_NORMAL_DUMP = 4,
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DIAG308_SET = 5,
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DIAG308_STORE = 6,
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};
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enum diag308_ipl_type {
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DIAG308_IPL_TYPE_FCP = 0,
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DIAG308_IPL_TYPE_CCW = 2,
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};
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enum diag308_opt {
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DIAG308_IPL_OPT_IPL = 0x10,
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DIAG308_IPL_OPT_DUMP = 0x20,
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};
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enum diag308_flags {
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DIAG308_FLAGS_LP_VALID = 0x80,
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};
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enum diag308_vm_flags {
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DIAG308_VM_FLAGS_NSS_VALID = 0x80,
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DIAG308_VM_FLAGS_VP_VALID = 0x40,
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};
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enum diag308_rc {
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DIAG308_RC_OK = 0x0001,
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DIAG308_RC_NOCONFIG = 0x0102,
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};
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extern int diag308(unsigned long subcode, void *addr);
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extern void diag308_reset(void);
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extern void store_status(void (*fn)(void *), void *data);
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extern void lgr_info_log(void);
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#endif /* _ASM_S390_IPL_H */
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