platform should be a read-only variable, if it is placed in the data
segment, it may be exploited.

Signed-off-by: Xiang Wang <wxjstz@126.com>

A warm reset by pressing the reset button may not initialize all the
registers to zero. Do it for every hart during warm boot.

Signed-off-by: Atish Patra <atish.patra@wdc.com>

Signed-off-by: Atish Patra <atish.patra@wdc.com>

Signed-off-by: Atish Patra <atish.patra@wdc.com>

As per the current SBI specification, sbi_getc should return
an int instead of char.

In case of FIFO is empty, return -1 as per the specification.

Reported-by: Sergi Granell <xerpi.g.12@gmail.com>
Suggested-by: Thadeu Lima de Souza Cascardo <cascardo@cascardo.eti.br>
Signed-off-by: Atish Patra <atish.patra@wdc.com>

Multi-core communication via memory requires the addition of a barrier
instructions to ensure cache coherency.

Signed-off-by: Xiang Wang <wxjstz@126.com>

Writable code section can cause some security problems, so move _boot_hart_done
to the data section

Signed-off-by: Xiang Wang <wxjstz@126.com>

Signed-off-by: Xiang Wang <wxjstz@126.com>

This patch updates OpenSBI version to 0.3 as part of
release preparation.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

Ensure the platform variable PLATFORM_RISCV_XLEN is set before we parse
the platform files.

This fixes the 32-bit openSBI FW_JUMP_ADDR.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

This patch increases OpenSBI version to 0.2.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

This patch adds scripts/create-binary-archive.sh which helps
us create a common tarball containing headers, static library
and firmware ELFs for all platforms.

This script can be used for release purpose OR for compile
testing all platforms.

Example usage commands are as follows:

1) Binary release archive for 32bit systems
./scripts/create-binary-archive.sh -s "bin" -x 32 -d

2) Binary release archive for 64bit systems
./scripts/create-binary-archive.sh -s "bin" -d

3) Compile test for 32bit systems
./scripts/create-binary-archive.sh -x 32 -t

4) Compile test for 64bit systems
./scripts/create-binary-archive.sh -t

Signed-off-by: Anup Patel <anup.patel@wdc.com>

The compile_ld() is actually used to create ELF files so
the name is misleading hence this patch renames it to
compile_elf(). We also rename LDFLAGS to ELFFLAGS because
these will be used for ELF creation only.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

Signed-off-by: Atish Patra <atish.patra@wdc.com>

This patch extends our low-level trap handler in fw_base.S for
handling M-mode to M-mode traps without overwritting stack.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

The unsigned long is always machine word size. This means it is
4 bytes on 32bit system and 8 bytes on 64bit system.

This patch adds PRILX define for sbi_printf() which will help us
print unsigned long without worrying whether it is 32bit or 64bit
system.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

There was a space instead of '_' in the function `platform_final_init`.

Following updates to fu540 platform guide.

1. Update a section about flashing the firmware binary
to sdcard with correct partition identifier.
2. Refer the individual payload section.
3. Update uboot booting section.

Signed-off-by: Atish Patra <atish.patra@wdc.com>

Signed-off-by: Atish Patra <atish.patra@wdc.com>

Signed-off-by: Atish Patra <atish.patra@wdc.com>

Signed-off-by: Atish Patra <atish.patra@wdc.com>

This patch replaces use of awk with sed in top-level makefile
to parse OpenSBI version from include/sbi/sbi_version.h.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

We get following error evaluating OPENSBI_CC_XLEN on
Ubuntu-18.04:
/bin/sh: 1: Bad substitution

This patch fixes above error by using "awk" in string
assigned to OPENSBI_CC_XLEN and it also moves "Setup
compilation commands" before OPENSBI_CC_XLEN.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

The mask shift in for-loop of sbi_ipi_send_many() is
broken with commit 918c1354


("lib: Improve delivery of SBI_IPI_EVENT_HALT")

This patch fix it.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

When sbi_ipi_send_many gets called with the current hartid
included on pmask (or when pmask is NULL), and we send
a HALT event, since the for loop works sequentially over
all hartids on the mask, we may send a HALT event to the
current hart before the loop finishes. So we will halt
the current hart before it can deliver a HALT IPI to the
rest and some harts will remain active.

Make sure we send an IPI to the current hart after we've
finished with everybody else.

Signed-off-by: Nick Kossifidis <mick@ics.forth.gr>

In order for QEMU to be compatible with Spike, it implements
a simple protocol used for reporting back the simulation's
status, through the memory-mapped "test finisher" device. We
use that protocol to make QEMU exit on system shutdown.

Signed-off-by: Nick Kossifidis <mick@ics.forth.gr>

In case the platform specific method for shutting down
the system fails (or is not implemented), at least make
sure that all harts hang instead of just the current hart.

Signed-off-by: Nick Kossifidis <mick@ics.forth.gr>

Previously OPENSBI_CC_XLEN was not being correctly assigned either 32 or
64. It also was not assigned before config.mk was parsed. Ensure that it
will always be assigned.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

Add 'make run' command for platform specific run

Makes for easy and quick build-run one-stop command.

For now only added for qemu targets. It can be added for
any platform having simulator/emulator (such as QEMU).

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Anup Patel <anup.patel@wdc.com>

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

Add a device tree for th HiFive Unleashed that includes the Microsemi
PCIe root complex.

Once we have support for u-boot and in tree Linux kernel device trees
this device tree should be removed.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

We expect the payloads to be 4 bit alligned as we later AND them
with ~0xf. As most of the addresses are manually specified we don't
really need this, but better to be over cautious.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

On Makefile merge_objs calls ld without providing any hints
on the target so on a multilib toolchain for example it will
always pick the default one (elf64-littleriscv) which will
then result a failure when compiling on RV32 since the objects
will be 32bits and the target will be 64bits. The same happens
on compile_ld that calls gcc without CFLAGS so it doesn't
get mabi/march.

With this patch OpenSBI compiles on RV32 (PLATFORM_RISCV_XLEN=32),
I tested fw_jump.elf on qemu (but it doesn't boot the kernel yet
-bbl also doesn't boot the kernel so it may be something else).

Signed-off-by: Nick Kossifidis <mickflemm@gmail.com>