opensbi.git/platform/generic/platform.c, branch v1.3

lib: reset: Move fdt_reset_init into generic_early_init

2023-06-21T05:42:42Z

The fdt_reset_thead driver needs to modify the __reset_thead_csr_stub text region for the secondary harts booting. After that, the sbi_hart_pmp_configure may lock down the text region with M_READABLE & M_EXECUTABLE attributes in the future. Currently, the M_READABLE & M_EXECUtABLE have no effect on m-mode, the L-bit in pmpcfg csr is useless for the current opensbi scenario. See: Priv-isa-spec 3.7.1.2. Locking and Privilege Mode When the L bit is clear, any M-mode access matching the PMP entry will succeed; the R/W/X permissions apply only to S and U modes. That's why current fdt_reset_thead could still work well after commit: 230278dcf127 ("lib: sbi: Add separate entries for firmware RX and RW regions"). So this patch fixes up a fake bug for the M-mode permission setting of the future. Fixes: 230278dcf127 ("lib: sbi: Add separate entries for firmware RX and RW regions") Link: http://lists.infradead.org/pipermail/opensbi/2023-June/005176.html Reported-by: Jessica Clarke Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Anup Patel

platform: Allow platforms to specify heap size

2023-06-05T10:15:33Z

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 Reviewed-by: Andrew Jones

platform: generic: Add system suspend test

2023-02-27T14:20:51Z

When the system-suspend-test property is present in the domain config node as shown below, implement system suspend with a simple 5 second delay followed by a WFI. This allows testing system suspend when the low-level firmware doesn't support it. / { chosen { opensbi-domains { compatible = "opensbi,domain,config"; system-suspend-test; }; Signed-off-by: Andrew Jones Reviewed-by: Anup Patel

include: sbi: Remove extid parameter from vendor_ext_provider() callback

2023-02-27T05:56:37Z

The extid parameter of vendor_ext_provider() is redundant so let us remove it. Signed-off-by: Anup Patel

lib: sbi: Align SBI vendor extension id with mvendorid CSR

2023-02-27T05:56:35Z

As-per the SBI specification, the lower 24bits of the SBI vendor extension id is same as lower 24bits of the mvendorid CSR. We update the SBI vendor extension id checking based on above. Signed-off-by: Anup Patel

platform: generic: Allow platform_override to perform firmware init

2023-01-07T10:28:54Z

We add a generic platform override callback to allow platform specific firmware init. Signed-off-by: Wei Liang Lim Reviewed-by: Chee Hong Ang Reviewed-by: Jun Liang Tan Reviewed-by: Anup Patel

platform: generic: Allow platform_override to select cold boot HART

2023-01-07T10:28:52Z

We add a generic platform override callback to allow platform specific selection of cold boot HART. Signed-off-by: Anup Patel

platform: generic: Make use of fdt_match_node()

2022-12-09T05:43:00Z

It makes sense to use fdt_match_node() instead of fdt_find_match() in fw_platform_lookup_special() as we already have the start offset to search from. Signed-off-by: Lad Prabhakar Reviewed-by: Anup Patel

platform: generic: add extensions_init handler and platform-override

2022-10-13T04:22:06Z

Init of non-standard extensions is a platform-specific thing, so allow generic platforms to do this via a platform-override. Reviewed-by: Andrew Jones Reviewed-by: Guo Ren Reviewed-by: Anup Patel Signed-off-by: Heiko Stuebner

lib: utils/serial: add semihosting support

2022-09-13T12:54:42Z

We add RISC-V semihosting based serial console for JTAG based early debugging. The RISC-V semihosting specification is available at: https://github.com/riscv/riscv-semihosting-spec/blob/main/riscv-semihosting-spec.adoc Signed-off-by: Anup Patel Signed-off-by: Kautuk Consul Reviewed-by: Anup Patel