Currently, global page mappings are not flushed if start and size
arguments are zero.

Flush entire TLB if both size and start argument is passed as zero.

Fixes : 90cb4917

 (lib: Implement sfence.vma correctly)

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

There are some spaces or mixed usage of spaces and tabs in the macro
definition. Change to use tab consistently.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>

It's U-Boot, not U-boot.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>

Currently, OpenSBI doesn't distinguish between sfence.vma
and sfence.vm asid calls. Moreover, it ignores the page
ranges and just flush entire TLB everytime.

Fix the sfence implementation by keeping all the tlb flush
info in scratch area.

The relevant Linux kernel code was added by
https://patchwork.kernel.org/project/linux-riscv/list/?series=89695



However, this patch is backward compatible with older version kernel
that doesn't have the above patches as well.

Fixes #87
Signed-off-by: Atish Patra <atish.patra@wdc.com>

Create a sbi_ipi_data structure that holds unpacked IPI information. At
the same time remove ipi_type from the sbi_scratch struct and use a
fixed offset to access it.

This structure fits in behind the sbi_scratch structure.

This fixes https://github.com/riscv/opensbi/issues/81



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

A warm reset using reset button may put icache and registers
in non-coherent state.

Flush the icache and reset all registers for every hart.

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

All the non-boot harts run in a tight loop which may cause a heavy load
on the memory bus. This may delay the boot hart to complete the cold boot
process.

Introduce few nop that will ease up the traffic.

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

This reverts commit 05602e2b.

Introducing a fence causes warm reset issue to reappear. Revert it
for the time being.

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>