opensbi.git/platform, branch v0.8

platform: Update Nuclei ux600 platform support

2020-06-17T15:36:40Z

Changes are made to support our FPGA evaluation board, it has DDR memory(0xA0000000-0xB0000000). * Adapt the config.mk to match FPGA evaluation board DDR memory address * Since the RISC-V CPU core frequency of FPGA might change, so we use the fixed TIMER frequency to measure the real CPU core frequency. * And the UART baudrate has to set to 57600bps for Nuclei FPGA evaluation board when CPU core frequency is about 8MHz, otherwise the UART input will not work correctly. Signed-off-by: Huaqi Fang <578567190@qq.com> Reviewed-by: Anup Patel

platform/lib: Allow the OS to map the regions that are protected by PMP

2020-06-15T03:55:44Z

This is achieved by removing the 'no-map' property from the 'reserved-memory' node when PMP is present, otherwise we keep it as it offers a small protection if the OS does not map this region at all. A new callback in platform_override is introduced and allows to fixup the device-tree. It is used here to override this new default behaviour on SiFive Fu540 platforms that has an erratum that prevents S-mode software to access a PMP protected region using 1GB page table mapping. If PMP is present, telling the OS not to map the reserved regions does not add much protection since it only avoids access to regions that are already protected by PMP. But by not allowing the OS to map those regions, it creates holes in the OS system memory map and prevents the use of hugepages which would generate, among other benefits, less TLB miss. Signed-off-by: Alexandre Ghiti Reviewed-by: Atish Patra Reviewed-by: Anup Patel

platform: Add AE350 cache control SBIs

2020-06-10T03:58:52Z

This patch contains the following AE350 specific SBIs: - get mcache_ctl status - get mmisc_ctl status - set mcache_ctl status - set mmisc_ctl status - I-cache operation - D-cache operation - enable/disable L1-I-cache prefetch - enable/disable L1-D-cache prefetch - enable/disable non-blocking load store - enable/disable write-around Signed-off-by: Nylon Chen Reviewed-by: Anup Patel Reviewed-by: Atish Patra

platform: Add AE350 platform specific SBI handler

2020-06-10T03:57:46Z

We add AE350 platform specific SBI handler to implement AE350 specific SBI calls. Signed-off-by: Nylon Chen Reviewed-by: Anup Patel Reviewed-by: Atish Patra

firmware: Remove FW_PAYLOAD_FDT and related documentation

2020-06-05T03:33:05Z

Now that no platform is using FW_PAYLOAD_FDT mechanism, we remove related code from Makefile and related documentation. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

platform: kendryte/k210: Use new mechanism of builtin DTB

2020-06-05T03:33:02Z

We update kendryte/k210 to use new mechanism of having builtin DTB where we convert k210.dts to C source and further compile-n-link it with libplatsbi.a. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

firmware: Allow fw_platform_init() to return updated FDT location

2020-06-05T03:32:34Z

Currently, the fw_platform_init() does not return anything but we can further improve by allowing fw_platform_init() to return updated FDT location. It is certainly not mandatory for fw_platform_init() to return a new location of FDT (or modify FDT). In fact, the fw_platform_init() can always return the original FDT location (i.e. 'arg1') unmodified. This new capability of fw_platform_init() will allow platforms to: 1. Have multiple built-in FDTs and select one 2. Modify FDT before using based on platform specific straps or OTP Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: utils: Allow CLINT functions to be used for multiple CLINTs

2020-05-23T05:06:43Z

We extend CLINT cold init function to have a "struct clint_data *" parameter pointing to CLINT details. This allows platforms to use CLINT functions for multiple CLINT instances. When multiple CLINTs are present, the platform can also provide one of the CLINT as reference CLINT for other CLINTs. This will help CLINTs to sync their time value with reference CLINT using a time_delta computed in warm init function. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: utils: Extend fdt_find_match() Implementation

2020-05-23T05:06:33Z

We extend fdt_find_match() implementation by adding node offset parameter which represents the first node to match from. The improved fdt_find_match() can be used to find multiple match nodes. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: utils: Allow PLIC functions to be used for multiple PLICs

2020-05-23T05:06:29Z

We extend all PLIC functions to have a "struct plic_data *" parameter pointing to PLIC details. This allows platforms to use these functions for multiple PLIC instances. Signed-off-by: Anup Patel Reviewed-by: Atish Patra