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https://github.com/ibm-s390-linux/s390-tools.git
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19f747847f
Use C pre-processor for linker script generation and refactor some constants. This allows the usage of the constants in our "linker scripts" `*.lds.S` (actually, these are assembler files, so we can make us of the C pre-processor and its capabilities). While at it, enforce the described memory layout in the generated linker script. Reviewed-by: Stefan Haberland <sth@linux.ibm.com> Reviewed-by: Philipp Rudo <prudo@linux.ibm.com> Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
82 lines
1.5 KiB
C
82 lines
1.5 KiB
C
/*
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* zipl - zSeries Initial Program Loader tool
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*
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* Main program for stage2 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 COMMON_H
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#define COMMON_H
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#include "lib/zt_common.h"
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#define DESCR_PER_BLOCK _AC(16, U)
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#ifndef __ASSEMBLER__
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#include "libc.h"
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#include "boot/s390.h"
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#include "cio.h"
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#include "error.h"
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/* Layout of ECKD disk block pointer */
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struct eckd_blockptr {
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uint16_t cyl;
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uint16_t head;
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uint8_t sec;
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uint16_t size;
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uint8_t blockct;
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uint8_t reserved[8];
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} __packed;
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struct linear_blockptr {
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uint64_t blockno;
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uint16_t size;
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uint16_t blockct;
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uint8_t reserved[4];
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} __packed;
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typedef union {
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struct eckd_blockptr eckd;
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struct linear_blockptr linear;
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} disk_blockptr_t;
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struct component_header {
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uint8_t magic[4];
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uint8_t type;
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uint8_t reserved[27];
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} __packed;
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struct component_entry {
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uint8_t data[23];
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uint8_t type;
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union {
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uint32_t load_address[2];
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uint64_t load_psw;
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} address;
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} __packed;
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typedef enum {
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COMPONENT_EXECUTE = 0x01,
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COMPONENT_LOAD = 0x02,
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COMPONENT_SIGNATURE = 0x03
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} component_type;
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struct stage2_descr {
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uint8_t reserved[16];
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} __packed __aligned(8);
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void *load_direct(disk_blockptr_t *, struct subchannel_id , void *);
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int extract_length(void *);
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int is_zero_block(void *);
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void kdump_stage2(unsigned long);
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#endif /* __ASSEMBLER__ */
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#endif /* COMMON_H */
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