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>
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>
This patch adds doxygen style documentation for struct sbi_trap_regs
and related macros/defines/functions.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
There are quite a few noreturn functions in OpenSBI hence
we add commong __noreturn define for noreturn functin attribute.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
This patch extends top-level makefile to build and install
documentation. The 'docs' make target is for building the
documentation PDF whereas 'install_docs' make target is for
installing the documentation PDF.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
The '?=' will not assign value if the target make variable is
overriden via command-line or is set in environment variable.
On other hand, '=' will not assign value only if variable is
overriden via command-line parameter.
It is quite common to have CC, AS, CPP, LD, etc to be set as
environment variables pointing to native compiler and binutils.
If '-rR' option is not set in MAKEFLAGS then this results in
compile error because '?=' will use the native compiler and
binutils. If '-rR' option is set in MAKEFLAGS then this again
results in compile error because CC, AS, CPP, etc are set to
empty strings which causes '?=' to use empty string as compiler
and binutils.
To handle this, we use '?=' only when CROSS_COMPILE is not
defined and we use '=' when CROSS_COMPILE is defined.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
To avoid this message (and subsequent errors):
warning: linker input file unused because linking not done
force GCC to treat the linker script preprocessing as a C file.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Convert the Makefile to a more standard format and don't forcefully
overwrite a users enviroment.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Instead of using a confusing and custom option, allow verbose Makefile
with the standard V=1.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Simplify sysctl.c code to only the used CPU freqency function.
This reduces the size of the final firmware by 4KB.
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Instead of printing the generic "<build_directory>" and
"<install_directory>" strings, print the actual paths for the build
and install directories during "make clean" and "make distclean".
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
The tmp0 member was added in struct sbi_scratch to assist
register save/restore at time of trap handling. This tmp0
is not unsed any more hence removing it.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
The struct sbi_trap_regs related defines RISCV_TRAP_REGS_xyz should
be in sbi_trap.h so that we can keep these defines in-sync with changes
in struct sbi_trap_regs.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
The struct sbi_platform related defines RISCV_PLATFORM_xyz should
be in sbi_platform.h so that we can keep these defines in-sync
with changes in struct sbi_platform.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
The struct sbi_scratch related defines RISCV_SCRATCH_xyz should
be in sbi_scratch.h so that we can keep these defines in-sync
with changes in struct sbi_scratch.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
We replace #csr with __ASM_STR(csr) in all csr_xyz() macros
so that we can pass CSR number instead of CSR name when GCC
is not aware of CSR name.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
The patch removes redundant csr_read_n() and csr_write_n()
because same thing can be achieved by using __ASM_STR()
macro in csr_read() and csr_write() macros.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Currently, we fail with error SBI_ENOTSUPP when we are not able
to handle illegal instruction trap. Instead, we should just
redirect illegal instruction trap to S-mode when not handled.
This redirection of illegal instruction trap will help lazy
save/restore of floating point registers to work correctly in
Linux kernel.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
We rename sifive/hifive_u540 platform support to sifive/fu540
to match the SoC name which is SiFive FU540 (as-per user manual).
In fact, we can expect no (or very minimal) board specific
quirks in sifive/fu540 platform support. These board specific
quirks can be turned on/off in-future using PLATFORM_<xyz>
make command-line option.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Atish Patra <atish.patra@wdc.com>
The mtval CSR is very useful information when debugging hence
print it upon trap error in sbi_trap_error().
Signed-off-by: Anup Patel <anup.patel@wdc.com>
We rename target_hart parameter of PMP platform callbacks to
hartid for clarity because the parameter represents current
hartid.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Instead of having separate timer_init() hooks for cold and
warm boot, this patch updates struct sbi_platform to have just
one timer_init() hook. The type of boot (cold or warm) is now
a boolean flag parameter for the updated timer_init() hook.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Instead of having separate ipi_init() hooks for cold and warm boot,
this patch updates struct sbi_platform to have just one ipi_init()
hook. The type of boot (cold or warm) is now a boolean flag parameter
for the updated ipi_init() hook.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Instead of having separate irqchip_init() hooks for cold and
warm boot, this patch updates struct sbi_platform to have just
one irqchip_init() hook. The type of boot (cold or warm) is now
a boolean flag parameter for the updated irqchip_init() hook.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Instead of having separate early_init() and final_init() hooks
for cold and warm boot, this patch updates struct sbi_platform
to have just one early_init() and one final_init() hook. The
type of boot (cold or warm) is now a boolean flag parameter for
the updated early_init() and final_init() hooks.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
The fw_common.S is the base firmware extendend by fw_jump and
fw_payload. This patch renames fw_common.S to fw_base.S to
have more clear/intutive name for base firmware.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
This improves 'clean' and 'distclean' makefile target as follows:
1. Remove only .o, .a, .elf, and .bin files for 'clean'
2. Remove .dep in-addition to what 'clean' does for 'distclean'
3. Remove default build and install directory for 'distclean'
Signed-off-by: Anup Patel <anup.patel@wdc.com>
We now have payloads sub-directory under firmware directory which
means payload BINs and ELFs should be installed under firmware/payloads.
This patch improves inst_file_list() to handle payloads sub-directory
under firmware installation directory.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Currently, the default payload for FW_PAYLOAD is embedded
fw_payload.S itself. This means people have to hack fw_payload.S
if they want to have some temporary S-mode test code.
This patch adds a separate dummy payload for FW_PAYLOAD which
can be easily hacked for some S-mode testing.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
This patch moves all ECALL defines to sbi_ecall_interface.h so
that it can be shared with firmware payloads.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
