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When -march=rv64im_zalrsc_zicsr is used, provide atomic operations
and locks using lr and sc instructions only.
Signed-off-by: Chao-ying Fu <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
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Due to some historical issues, the value of BOOT_STATUS_BOOT_HART_DONE
has changed and the comment message needs to be corrected.
Signed-off-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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The --gc-sections option enables the linker to perform garbage
collection of unreferenced code and data, thereby reducing the binary
size.
The -ffunction-sections option will place each function into a separate
section, so it is necessary to add .text.* to the linker script.
Signed-off-by: Kele Zhang <[email protected]>
Signed-off-by: Yuan Tan <[email protected]>
Signed-off-by: Zhangjin Wu <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Reviewed-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Add support for the Smdbltrp[1] ISA extension. First thing to do is
clearing MDT on entry after setting the first MTVEC (since MDT is
reset to 1). Additionally, during trap handling, clear MDT once all
critical CSRs have been saved and in return path, restore MSTATUS/H
before restoring MEPC to avoid taking another trap which would clobber
it.
Link: https://github.com/riscv/riscv-double-trap/releases/download/v0.56/riscv-double-trap.pdf [1]
Signed-off-by: Clément Léger <[email protected]>
Reviewed-by: Samuel Holland <[email protected]>
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In a multi-core startup scenario, if both _try_lottery and
_wait_for_boot_hart use the data in the _boot_status address, when
a CPU enters OpenSBI later than boot hart set the _boot_status to
BOOT_STATUS_BOOT_HART_DONE, the CPU will modify _boot_status to 1
by amoswap.w and will never be awakened in _wait_for_boot_hart.
So let _try_lottery and _boot_status use data from two addresses.
Fixes: 8151105af5e4 ("firmware: fw_base.S: Remove _relocate_lottery")
Signed-off-by: dong.yang <[email protected]>
Reviewed-by: Xing Xiaoguang <[email protected]>
Reviewed-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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This is a more efficient way to get the index of the current hart than
calling a function to loop through the hartindex -> hartid lookup table.
Signed-off-by: Samuel Holland <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Reduce the code size by using single-byte loads instead of bit
manipulation. This method also does the right thing on (hypothetical)
big-endian systems.
Signed-off-by: Samuel Holland <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Bring back FW_TEXT_START as an optional parameter to allow users
explicitly specify compile time address for loading debug symbols.
When not specified, the FW_TEXT_START is assumed to be 0.
Fixes: d4d2582eef7a ("firmware: remove FW_TEXT_START")
Signed-off-by: Anup Patel <[email protected]>
Tested-by: Clément Léger <[email protected]>
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Now opensbi can run at any address via dynamic relocation. We can
remove FW_TEXT_START.
Signed-off-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Tested-by: Anup Patel <[email protected]>
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Remove copy-base relocations that are no longer needed.
Signed-off-by: Xiang W <[email protected]>
Reviewed-by: Samuel Holland <[email protected]>
Tested-by: Samuel Holland <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Club the struct sbi_trap_regs and struct sbi_trap_info a new
struct sbi_trap_context (aka trap context) which must be saved
by low-level trap handler before calling sbi_trap_handler().
To track nested traps, the struct sbi_scratch points to the current
trap context and the trap context has pointer to pervious context
of previous trap.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Samuel Holland <[email protected]>
Tested-by: Samuel Holland <[email protected]>
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To track nested traps, the struct sbi_scratch needs a pointer the
current trap context so add trap_context pointer in struct sbi_context.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Samuel Holland <[email protected]>
Tested-by: Samuel Holland <[email protected]>
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Over the years, no uses of sbi_trap_exit() have been found so remove
it and also remove related code from fw_base.S and sbi_scratch.h.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Samuel Holland <[email protected]>
Tested-by: Samuel Holland <[email protected]>
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a3 and a4 cannot be reset because used in fw_platform_init.
Signed-off-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Remove _relocate_lottery and use _boot_status instead.
Signed-off-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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_bad_dynamic_info is same as _start_hang, so remove it.
Signed-off-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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The same detection was done twice when setting mtvec and trap_exit.
Merging can reduce code size.
Signed-off-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Simplify address get and remove _link_start _link_end _load_start.
Signed-off-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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The fw_payload.bin has the same issue as described in previous patch.
But only FW_PAYLOAD_FDT_ADDR is affected.
Add FW_PAYLOAD_FDT_OFFSET to identify relocatable payload fdt address.
Signed-off-by: Inochi Amaoto <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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If FW_PIC=y is defined, the fw_jump.bin will be broken if
FW_TEXT_START is wrong. This is not the desired behavior.
Add two new variables to identify relocatable jump address:
FW_JUMP_OFFSET and FW_JUMP_FDT_ADDR. To keep the existing
ABI, FW_JUMP_ADDR and FW_JUMP_FDT_ADDR is prefered if they
are defined.
Signed-off-by: Inochi Amaoto <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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_runtime_offset is a variable not used elsewhere, so remove it.
Signed-off-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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lwu exists under the current rv64 and should also exist under the rv128
in the future, so I modified the conditions of conditional compilation
so that it can adapt to the future situation
Signed-off-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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With a bare-metal linkers (e.g. riscv64-elf-ld), there exists no
dynsym section. The dynsym section is not used by OpenSBI but
discarding it makes linkers with dynamic library support unhappy.
Signed-off-by: Leon M. Busch-George <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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When calling '_reset_regs', it'll reset all registers except some
specific registers (ra, a0, a1, and a2).
Both boot HART and non-boot HARTs will execute the '_start_warm'
function. Therefore, when '_reset_regs' is called in '_start_warm', it
will reset all registers except some specific registers (ra, a0, a1 and
a2) for both boot HART and non-boot HARTs.
Signed-off-by: Zhang Runmin <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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These sections are only intended to hold data, and should not be executable.
Signed-off-by: Matt Waltz <[email protected]>
Reviewed-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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It's wrong to put the fence after setting the boot status flag because
all relocation operations must be finished before setting the status
flag. So, this fence must be put before the setting status flag, and
there is no use in putting a fence between _start_warm and setting
status flag.
Also, nop can't delay other harts too much, so use div instead, just
like Linux cpu_relax. Current opensbi force enables “M” Standard
Extension, and mul instructions have been used in the fw_base.S.
After the above two fixes, the boot hart index param of the
fw_dynamic_info could be guaranteed properly for all platforms.
Signed-off-by: Guo Ren <[email protected]>
Signed-off-by: Guo Ren <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Since everything is statically linked, we won't actually have
R_RISCV_{32,64} relocations. No need to handle these.
Fixes: 0f20e8adcf42 ("firmware: Support position independent execution")
Signed-off-by: Vivian Wang <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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The .rela.dyn section should be exactly the size of the relocations,
without padding. On RV64, .rela* sections are already aligned and
there's no need for padding. On RV32, this adds padding up to 4 bytes,
which, if present, confuses the relocation loop into processing an extra
entry past the end of .rela*, and it crashes with an invalid memory
access.
Fixes: 0f20e8adcf42 ("firmware: Support position independent execution")
Signed-off-by: Vivian Wang <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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As the the "Console Putchar" extension is already legacy and may
be removed in the furture. So replace it with the SBI v2.0 "DBCN"
extension.
Signed-off-by: Inochi Amaoto <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Attempting to build OpenSBI with clang 16 and the following command:
$ make LLVM=1 PLATFORM=generic
Results in the following error:
AS platform/generic/firmware/fw_dynamic.o
/tmp/fw_dynamic-d000a6.s:429:9: error: symbol '_fw_start' can not be undefined in a subtraction expression
.dword _fw_rw_start - _fw_start
Work around this issue by eliminating the __fw_rw_offset variable and
performing the offset calculation at run-time instead. This takes
advantage of the fact that the a4 register contains the value of
_fw_start.
Signed-off-by: Mitchell Horne <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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After the loop to find the hartid is launched, assigning -1 to
index will fail in the subsequent compare instruction bge. Fix
This.
Signed-off-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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We extend struct sbi_platform and struct sbi_scratch to allow platforms
specify the heap size to the OpenSBI firmwares. The OpenSBI firmwares
will use this information to determine the location of heap and provide
heap base address in per-HART scratch space.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Andrew Jones <[email protected]>
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The codes currently skip the very first relocation entry, but later
reference the elements in the relocation entry using minus offsets.
Change to use positive offsets so that there is no need to skip the
first relocation entry.
Signed-off-by: Bin Meng <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Reviewed-by: Xiang W <[email protected]>
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't5' already contains relocation type so don't bother reloading it.
Signed-off-by: Bin Meng <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Reviewed-by: Xiang W <[email protected]>
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If mip.SEIP bit is not cleared then on HiFive Unmatched board it causes
spurious external interrupts. This breaks the boot up of HiFive Unmatched
board. Hence it is required to bring the mip CSR to a known state during
hart init and avoid spurious interrupts.
Fixes: d9e7368 ("firmware: Not to clear all the MIP")
Signed-off-by: Mayuresh Chitale <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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In generic behavior of QEMU, if the pending bits of PLIC are still set and
we clear the SEIP, the QEMU may not set the SEIP back immediately and the
interrupt may not be handled anymore until the new interrupts arrived and
QEMU set the SEIP back which is a generic behavior in QEMU.
Signed-off-by: Nick Hu <[email protected]>
Signed-off-by: Jim Shu <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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It seems BFD just does totally nonsensical things for SHN_ABS symbols
when producing position-independent outputs (both -pie and -shared)
for various historical reasons, and so SHN_ABS symbols are still
subject to relocation as far as BFD is concerned (except AArch64,
which fixes it in limited cases that don’t apply here...).
The above affects the _fw_rw_offset provided through fw_base.ldS
linker script which results in OpenSBI firmware failing to boot
when loaded at an address different from FW_TEXT_START.
Fixes: c10e3fe5f9a1 ("firmware: Add RW section offset in scratch")
Signed-off-by: Jessica Clarke <[email protected]>
Reported-by: Lad Prabhakar <[email protected]>
Tested-by: Lad Prabhakar <[email protected]>
Tested-by: Anup Patel <[email protected]>
Signed-off-by: Anup Patel <[email protected]>
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Add the RW section offset, provided by _fw_rw_offset symbol,
to the scratch structure. This will be used to program
separate pmp entry for RW section.
Signed-off-by: Himanshu Chauhan <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Currently, the dynsym and reladyn sections are under RW data.
They are moved to the Read-only/Executable region.
Signed-off-by: Himanshu Chauhan <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Split the RO/RX and RW sections so that they can have
independent pmp entries with required permissions. The
split size is ensured to be a power-of-2 as required by
pmp.
_fw_rw_offset symbol marks the beginning of the data
section.
Signed-off-by: Himanshu Chauhan <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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The t3 register stores the address of _load_end. If relocation is not
required, it is unnecessary to calculate the address of _load_end.
This can reduce the operation time of two instructions.
Signed-off-by: Dongdong Zhang <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Delete the redundant "ALIGN" and adjust the position of "ALIGN"
Signed-off-by: Leizheng Zhang <[email protected]>
Reviewed-by: Andrew Jones <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
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We extend the top-level makefile to allow kconfig based configuration
for each platform where each platform has it's own set of configs with
"defconfig" being the default config.
Signed-off-by: Anup Patel <[email protected]>
Tested-by: Andrew Jones <[email protected]>
Acked-by: Atish Patra <[email protected]>
Tested-by: Atish Patra <[email protected]>
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lwu exists under the current rv64 and should also exist under the rv128
in the future, so I modified the conditions of conditional compilation
so that it can adapt to the future situation
Signed-off-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Some of the external firmwares using OpenSBI as library are facing
issues with the weak memcpy() and memset() aliases in libsbi.a so
we move these to fw_base.S. This way mapping of implicit memcpy()
or memset() calls to sbi_memcpy() or sbi_memset() will only be done
for OpenSBI firmwares.
(Refer, https://github.com/riscv-software-src/opensbi/issues/234)
In addition, we also add memmove() and memcmp() mappings in fw_base.S
because as-per the GCC documentation the freestanding environment must
provide memcpy(), memmove(), memset(), and memcmp().
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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It can be useful to make SBI v0.2 or newer ecalls from this payload
for testing purposes. To support this, convert the macros to use the
extension/function parameter convention.
Signed-off-by: Samuel Holland <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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The previous code uses _start as the load address, this default .entry is
the first segment, using _fw_start does not need to make this assumption.
Signed-off-by: Xiang W <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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If the device tree is at an address that is not __SIZEOF_POINTER__
aligned, the fdt relocation code tries to align both source and
destination address to __SIZEOF_POINTER__ before the memory copy.
But such alignment can lead to unexpected results if either source
or destination address is not aligned.
In fact libfdt requires that the device tree must be at an 8-byte
aligned address. Hence remove the unhelpful alignment codes.
Signed-off-by: Bin Meng <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Bare-metal GNU ld does not support PIE, so if using it this will result
in a failure to build. Instead, default to FW_PIC=n if not supported.
Note that an explicit FW_PIC=y is not overridden, to ensure the build
fails rather than silently producing a position-dependent binary.
Signed-off-by: Jessica Clarke <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Tested-by: Bin Meng <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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When using Clang with a bare-metal triple, -pie does not get passed to
the linker as it's not normally a thing that makes sense, unlike GCC
which will unconditionally forward it on and potentially result in a
linker error. However, LLD does support it, and manually forwarding it
on works as desired, so do so to fully support FW_PIC with Clang and
LLD.
Signed-off-by: Jessica Clarke <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Tested-by: Bin Meng <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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