diff options
Diffstat (limited to 'arch/s390/boot/startup.c')
| -rw-r--r-- | arch/s390/boot/startup.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c index b7d6a76cb5e9..e3f339d248ce 100644 --- a/arch/s390/boot/startup.c +++ b/arch/s390/boot/startup.c @@ -1,9 +1,11 @@ // SPDX-License-Identifier: GPL-2.0 #include <linux/string.h> #include <linux/elf.h> +#include <asm/sections.h> #include <asm/setup.h> #include <asm/kexec.h> #include <asm/sclp.h> +#include <asm/diag.h> #include <asm/uv.h> #include "compressed/decompressor.h" #include "boot.h" @@ -11,6 +13,43 @@ extern char __boot_data_start[], __boot_data_end[]; extern char __boot_data_preserved_start[], __boot_data_preserved_end[]; +/* + * Some code and data needs to stay below 2 GB, even when the kernel would be + * relocated above 2 GB, because it has to use 31 bit addresses. + * Such code and data is part of the .dma section, and its location is passed + * over to the decompressed / relocated kernel via the .boot.preserved.data + * section. + */ +extern char _sdma[], _edma[]; +extern char _stext_dma[], _etext_dma[]; +extern struct exception_table_entry _start_dma_ex_table[]; +extern struct exception_table_entry _stop_dma_ex_table[]; +unsigned long __bootdata_preserved(__sdma) = __pa(&_sdma); +unsigned long __bootdata_preserved(__edma) = __pa(&_edma); +unsigned long __bootdata_preserved(__stext_dma) = __pa(&_stext_dma); +unsigned long __bootdata_preserved(__etext_dma) = __pa(&_etext_dma); +struct exception_table_entry * + __bootdata_preserved(__start_dma_ex_table) = _start_dma_ex_table; +struct exception_table_entry * + __bootdata_preserved(__stop_dma_ex_table) = _stop_dma_ex_table; + +int _diag210_dma(struct diag210 *addr); +int _diag26c_dma(void *req, void *resp, enum diag26c_sc subcode); +int _diag14_dma(unsigned long rx, unsigned long ry1, unsigned long subcode); +void _diag0c_dma(struct hypfs_diag0c_entry *entry); +void _diag308_reset_dma(void); +struct diag_ops __bootdata_preserved(diag_dma_ops) = { + .diag210 = _diag210_dma, + .diag26c = _diag26c_dma, + .diag14 = _diag14_dma, + .diag0c = _diag0c_dma, + .diag308_reset = _diag308_reset_dma +}; +static struct diag210 _diag210_tmp_dma __section(".dma.data"); +struct diag210 *__bootdata_preserved(__diag210_tmp_dma) = &_diag210_tmp_dma; +void _swsusp_reset_dma(void); +unsigned long __bootdata_preserved(__swsusp_reset_dma) = __pa(_swsusp_reset_dma); + void error(char *x) { sclp_early_printk("\n\n"); |