starfive-tech/opensbi.git, branch debug

firmware/fw_payload: reduce the size by getting rid of padding

2021-04-28T18:22:36+00:00

Signed-off-by: Tekkaman Ninja

add starfive_vic7100 support in generic

2021-04-28T13:59:10+00:00

Add "snps,dw-apb-uart" in uart8250 driver.

2021-04-28T13:59:10+00:00

This patch add "snps,dw-apb-uart".compatible ID in uart8250 driver for StarFive VIC-7100. Signed-off-by: Tekkaman Ninja

Add StarFive VIC-7100 support

2021-04-28T13:59:10+00:00

This patch add StarFive VIC-7100 support. Signed-off-by: Tekkaman Ninja

include: headers: Replace ASSEMBLY with ASSEMBLER

2021-03-22T10:32:48+00:00

GCC has already a predefined macro __ASSEMBLER__ therefore, it can be used without the need to define a new flag with -D__ASSEMBLY__. This is useful when adding the library to projects having a build system such one can build without the need to make changes. THe build system does not use the Makefile in the sources tree. Signed-off-by: Marouene Boubakri Signed-off-by: Anup Patel

lib: sbi: illegal CSR 0x306 access in hpm_allowed()

2021-03-22T03:48:56+00:00

The trap handler sbi_emulate_csr_read() invokes hpm_allowed() which reads CSR 0x306 (mcounteren). The K210 does not support CSR 0x306. While trying to handle a trap occurring in S-mode code this creates an additional trap in M-mode. This results in failure to redirect to S-mode and the system hanging in sbi_hart_hang(). In hart_detect_features() we have already determined if CSR 0x306 is available and stored that information in the scratch area. We can use this information to decide if CSR 0x306 shall be accessed in hpm_allowed() and thus avoid the M-mode trap. Likewise if CSR scounteren is not available we have to avoid reading CSR 0x106. Signed-off-by: Heinrich Schuchardt Reviewed-by: Anup Patel

firmware: Support position independent execution

2021-03-19T09:30:50+00:00

Enable OpenSBI to support position independent execution. Because the position independent code will cause an additional GOT reference when accessing the global variables, it will reduce performance a bit. Therefore, the position independent execution is disabled by default. Users can through specifying "FW_PIC=y" on the make command to enable this feature. In theory, after enabling position-independent execution, the OpenSBI can run at arbitrary address with appropriate alignment. Therefore, the original relocation mechanism will be skipped. In other words, OpenSBI will directly run at the load address without any code movement. Signed-off-by: Vincent Chen Reviewed-by: Anup Patel

firmware: Use lla to access all global symbols

2021-03-19T09:27:45+00:00

When OpenSBI is compiled as fPIE mode, the assembler will translate "la" to GOT reference pattern. It will cause to cost an additional load instruction when obtaining the symbol address. However, if the symbol locates within the positive or negative 2GB region, we can use "lla" instead of "la" to avoid unneeded GOT references. This patch assumes that the OpenSBI image excluding the payload does not exceed 2GB. Based on this assumption, all "la" instructions are replaced by "lla" to avoid performance degradation when compiling as fPIE mode. Signed-off-by: Vincent Chen Reviewed-by: Anup Patel

include: sbi: SBI function IDs for RFENCE extension

2021-03-12T04:02:53+00:00

The SBI function IDs for RFENCE extension must match the SBI specification. Signed-off-by: Heinrich Schuchardt Reviewed-by: Atish Patra

lib: Remove redundant sbi_platform_ipi_clear() calls

2021-03-03T08:24:50+00:00

The sbi_platform_ipi_clear() called from wait_for_coldboot() and sbi_hsm_hart_wait() is redundant because IPI will be automatically cleared by sbi_platform_ipi_init() called from sbi_ipi_init(). Further, wait_for_coldboot() is common for warm startup and warm resume path so the sbi_platform_ipi_clear() called in warm resume path cause resuming HART to miss an IPI injected other HART to wakeup the HART. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

starfive-tech/opensbi.git, branch debug

firmware/fw_payload: reduce the size by getting rid of padding

add starfive_vic7100 support in generic

Add "snps,dw-apb-uart" in uart8250 driver.

Add StarFive VIC-7100 support

include: headers: Replace __ASSEMBLY__ with __ASSEMBLER__

lib: sbi: illegal CSR 0x306 access in hpm_allowed()

firmware: Support position independent execution

firmware: Use lla to access all global symbols

include: sbi: SBI function IDs for RFENCE extension

lib: Remove redundant sbi_platform_ipi_clear() calls

include: headers: Replace ASSEMBLY with ASSEMBLER