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Author SHA1 Message Date
Atish PatraandAnup Patel 00f77d9ba0 platform: Remove string functions from tinyfdt.c 
There are couple of string function defined in platform
code. We no longer need them as we can directly link minimal
libc.

Every platform required to inclde this as PLIC driver required
libc functions.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
 2019-01-18 10:05:12 +05:30
Atish PatraandAnup Patel cf83b6e438 platform: Include libfdt & libc. 
Signed-off-by: Atish Patra <atish.patra@wdc.com>
 2019-01-18 10:05:12 +05:30
Atish PatraandAnup Patel 57d5eaa5fb platform: Rename fdt.c to tinyfdt.c 
Libfdt already have fdt.c and fdt.h.
Rename both fdt.* present in openSBI to tinyfdt.*

Signed-off-by: Atish Patra <atish.patra@wdc.com>
 2019-01-18 10:05:12 +05:30
Atish PatraandAnup Patel e2ce15cb3b platform: Add libfdt support. 
Some of the platform (i.e. SiFive FU540) requires Device
Tree modification before it is passed to higher stages.
Add libfdt support now to help this process. Libfdt should
only be included per platform basis.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
 2019-01-18 10:05:12 +05:30
Atish PatraandAnup Patel 1901e8a287 platform: Add minimal libc support. 
libfdt requires minimal libc support. Absoultely
minimum functions are added in libc.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
 2019-01-18 10:05:12 +05:30
Atish Patra 8304ee9424 Disable all interrupts during warm irqchip init. 
M mode is not expected to recieve any interrupts.
S mode interrupts shouldn't be enabled in M mode.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
 2018-12-21 22:11:21 -08:00
Atish Patra 88b173b33b Introduce hart disabled parameter in platform. 
As of now, uboot doesn't have support for SMP.
Moreover, unleashed board has a E51 hart which
doesn't not support S mode.

We should only boot only 1 non-zero hart.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
 2018-12-21 22:11:21 -08:00
Atish Patra 95fbe7d495 Move hardcoded uart constant to macros. 
Signed-off-by: Atish Patra <atish.patra@wdc.com>
 2018-12-21 16:00:28 -08:00
Atish PatraandAnup Patel f003787455 lib: Hang in sbi_hart_boot_next() if next mode is not supported 
We should not jump to next stage if next mode (S-mode or U-mode)
is not supported by HART.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
 2018-12-21 11:09:47 +05:30
Atish Patra 1d4e36edf8 Support unsigned long in sbi_printf 
Signed-off-by: Atish Patra <atish.patra@wdc.com>
 2018-12-20 15:55:32 -08:00
Atish Patra 84971c0bc0 Use wfi for coldboot finish call. 
Signed-off-by: Atish Patra <atish.patra@wdc.com>
 2018-12-20 15:55:27 -08:00
Atish Patra e0a660ec5b Fix baud rate divisor computation for U540. 
Signed-off-by: Atish Patra <atish.patra@wdc.com>
 2018-12-20 15:38:43 -08:00
Atish Patra 3250fe7299 Support /r/n as newline character. 
Signed-off-by: Atish Patra <atish.patra@wdc.com>
 2018-12-20 15:38:43 -08:00
Atish Patra 5adf2fdc9e HiFive Unleashed has 5 harts. Fix the config to reflect that. 
Signed-off-by: Atish Patra <atish.patra@wdc.com>
 2018-12-20 15:38:43 -08:00