diff options
| author | Alexander Egorenkov <egorenar@linux.ibm.com> | 2020-11-05 13:09:06 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2021-07-27 09:39:15 +0200 |
| commit | f1d3c5323772a215d910aeaf697d210a3671cf81 (patch) | |
| tree | 18dd370f427bf284c19835fbed139d8ca23083cd /drivers/s390 | |
| parent | s390/boot: get rid of magic numbers for startup offsets (diff) | |
| download | linux-f1d3c5323772a215d910aeaf697d210a3671cf81.tar.xz linux-f1d3c5323772a215d910aeaf697d210a3671cf81.zip | |
s390/boot: move sclp early buffer from fixed address in asm to C
To make the decompressor relocatable, the early SCLP buffer with a fixed
address must be replaced with a relocatable C buffer of the according size
and alignment as required by SCLP.
Introduce a new function sclp_early_set_buffer() into the SCLP driver
which enables the decompressor to change the SCLP early buffer at any time.
This will be useful when the decompressor becomes fully relocatable and
might need to change the SCLP early buffer to one with an address < 2G
as required by SCLP because it was loaded at an address >= 2G.
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/char/sclp_early_core.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/s390/char/sclp_early_core.c b/drivers/s390/char/sclp_early_core.c index 80ba6523e76e..676634de65a8 100644 --- a/drivers/s390/char/sclp_early_core.c +++ b/drivers/s390/char/sclp_early_core.c @@ -17,7 +17,7 @@ static struct read_info_sccb __bootdata(sclp_info_sccb); static int __bootdata(sclp_info_sccb_valid); -char *sclp_early_sccb = (char *) EARLY_SCCB_OFFSET; +char *__bootdata(sclp_early_sccb); int sclp_init_state = sclp_init_state_uninitialized; /* * Used to keep track of the size of the event masks. Qemu until version 2.11 @@ -211,6 +211,11 @@ static int sclp_early_setup(int disable, int *have_linemode, int *have_vt220) return rc; } +void sclp_early_set_buffer(void *sccb) +{ + sclp_early_sccb = sccb; +} + /* * Output one or more lines of text on the SCLP console (VT220 and / * or line-mode). |