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8bf5f8d0e2
The zipl internal loader adds a variable BOOT_IMAGE= to the commandline so that it is visible in the operating system which menu entry has been chosen. This entry was overwritten by the stage3 parameter page. Fix by re-arranging the internal memory layout and putting the command line extra param, which contains the BOOT_IMAGE entry, at 0xe000. This location is available because less than one page is used for the stack. Fixes: https://github.com/ibm-s390-tools/s390-tools/issues/67 Signed-off-by: Stefan Haberland <sth@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
183 lines
4.1 KiB
C
183 lines
4.1 KiB
C
/*
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* zipl - zSeries Initial Program Loader tool
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*
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* Main program for stage3 bootloader.
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*
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* Copyright IBM Corp. 2013, 2017
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef STAGE3_H
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#define STAGE3_H
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#include "libc.h"
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#include "s390.h"
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#define IPL_DEVICE 0x10404
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#define INITRD_START 0x10408
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#define INITRD_SIZE 0x10410
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#define OLDMEM_BASE 0x10418
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#define OLDMEM_SIZE 0x10420
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#define COMMAND_LINE 0x10480
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#define COMMAND_LINE_SIZE 896
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#define COMMAND_LINE_EXTRA 0xE000
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#define STAGE3_FLAG_SCSI 0x0001000000000000ULL
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#define STAGE3_FLAG_KDUMP 0x0002000000000000ULL
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#define IPL_FLAG_SECURE 0x40
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#define DEFAULT_IMAGE_ADDR 0x10000
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#define DEFAULT_PSW_LOAD 0x0008000080010000L
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#define PSW_ADDR_MASK 0x000000007FFFFFFFL
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#define KERNEL_HEADER_SIZE 65536
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#define UNSPECIFIED_ADDRESS -1ULL
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/* IPL Parameter List header */
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struct ipl_pl_hdr {
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uint32_t len;
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uint8_t flags;
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uint8_t reserved1[2];
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uint8_t version;
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} __packed;
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/* IPL Parameter Block header */
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struct ipl_pb_hdr {
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uint32_t len;
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uint8_t pbt;
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} __packed;
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/* IPL Parameter Block 0 with common fields */
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struct ipl_pb0_common {
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uint32_t len;
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uint8_t pbt;
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uint8_t flags;
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uint8_t reserved1[2];
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uint8_t loadparm[8];
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uint8_t reserved2[84];
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} __packed;
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/* IPL Parameter Block 0 for FCP */
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struct ipl_pb0_fcp {
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uint32_t len;
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uint8_t pbt;
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uint8_t reserved1[3];
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uint8_t loadparm[8];
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uint8_t reserved2[304];
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uint8_t opt;
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uint8_t reserved3[3];
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uint8_t cssid;
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uint8_t reserved4[1];
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uint8_t devno;
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uint8_t reserved5[4];
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uint64_t wwpn;
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uint64_t lun;
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uint32_t bootprog;
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uint8_t reserved6[12];
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uint64_t br_lba;
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uint32_t scp_data_len;
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uint8_t reserved7[260];
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uint8_t scp_data[];
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} __packed;
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/* IPL Parameter Block 0 for CCW */
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struct ipl_pb0_ccw {
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uint32_t len;
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uint8_t pbt;
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uint8_t flags;
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uint8_t reserved1[2];
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uint8_t loadparm[8];
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uint8_t reserved2[84];
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uint16_t reserved3 : 13;
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uint8_t ssid : 3;
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uint16_t devno;
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uint8_t vm_flags;
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uint8_t reserved4[3];
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uint32_t vm_parm_len;
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uint8_t nss_name[8];
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uint8_t vm_parm[64];
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uint8_t reserved5[8];
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} __packed;
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struct ipl_parameter_block {
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struct ipl_pl_hdr hdr;
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union {
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struct ipl_pb_hdr pb0_hdr;
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struct ipl_pb0_common common;
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struct ipl_pb0_fcp fcp;
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struct ipl_pb0_ccw ccw;
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char raw[PAGE_SIZE - sizeof(struct ipl_pl_hdr)];
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};
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} __packed __aligned(PAGE_SIZE);
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/* IPL Report List header */
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struct ipl_rl_hdr {
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uint32_t len;
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uint8_t flags;
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uint8_t reserved1[2];
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uint8_t version;
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uint8_t reserved2[8];
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} __packed;
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/* IPL Report Block header */
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struct ipl_rb_hdr {
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uint32_t len;
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uint8_t rbt;
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uint8_t reserved1[11];
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} __packed;
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/* IPL Report Block types */
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enum ipl_rbt {
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IPL_RBT_CERTIFICATES = 1,
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IPL_RBT_COMPONENTS = 2,
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};
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/* IPL Report Block for the certificate list */
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struct ipl_rb_certificate_entry {
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uint64_t addr;
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uint64_t len;
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} __packed;
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struct ipl_rb_certificates {
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uint32_t len;
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uint8_t rbt;
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uint8_t reserved1[11];
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struct ipl_rb_certificate_entry entries[];
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} __packed;
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/* IPL Report Block for the component list */
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struct ipl_rb_component_entry {
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uint64_t addr;
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uint64_t len;
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uint8_t flags;
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uint8_t reserved1[5];
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uint16_t certificate_index;
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uint8_t reserved2[8];
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};
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#define IPL_RB_COMPONENT_FLAG_SIGNED 0x80
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#define IPL_RB_COMPONENT_FLAG_VERIFIED 0x40
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struct ipl_rb_components {
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uint32_t len;
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uint8_t rbt;
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uint8_t reserved1[11];
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struct ipl_rb_component_entry entries[];
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} __packed;
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extern unsigned long long _parm_addr; /* address of parmline */
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extern unsigned long long _initrd_addr; /* address of initrd */
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extern unsigned long long _initrd_len; /* length of initrd */
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extern unsigned long long _load_psw; /* load psw of kernel */
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extern unsigned long long _extra_parm; /* use extra parm line mechanism? */
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extern unsigned long long stage3_flags; /* flags (e.g. STAGE3_FLAG_KDUMP) */
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extern unsigned long long _image_len; /* length of kernel */
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extern unsigned long long _image_addr; /* target address of kernel */
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extern void kdump_stage3();
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#endif /* STAGE3_H */
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