This adds DM drivers to support RISC-V CPU and timer, plus some bug fixes.
This series is available at u-boot-x86/riscv-working for testing.
Changes in v4: - print warnings for S-mode without CONFIG_CPU
Changes in v3: - remove 'select RISCV_CLINT' in Kconfig - do not mention the spec version number v1.10 - adjust riscv_get_time() API signature to have a return value - check return value of syscon_get_first_range() - probe cpus in the pre-relocation stage too - new patch to remove non-DM version of print_cpuinfo() - add sedeleg (0x102) and sideleg (0x103) CSRs - new patch to update supports_extension() to use desc from cpu driver - only initialize mcounteren CSR for S-mode - only touch satp in M-mode U-Boot - move the implementation to arch_cpu_init_dm() - new patch to save boot hart id to the global data - new patch to change to use boot_hart from global data - new patch to remove ae350.dts
Changes in v2: - Use 'Hz' instead of 'HZ' - add DM_FLAG_PRE_RELOC flag to the simple-bus driver - pass NULL as the timer device to device_bind_with_driver_data() - remove the probe to syscon driver in the timer probe, to make the driver generic, and rely on platform codes to provide the API riscv_get_time(). - incorporated and reworked Anup's S-mode timer patch @ http://patchwork.ozlabs.org/patch/1006663/ - rename the driver name to sifive_clint - save the clint base address to arch specific global data to support pre-relocation stage - remove the probe routine - add riscv_clear_ipi() API - incorporated and reworked Anup's S-mode timer patch @ http://patchwork.ozlabs.org/patch/1006663/ - add CMD_CPU as well - move to arch/riscv/cpu/cpu.c - new patch to add indirect stringification to csr_xxx ops - use csr_set() to set MSTATUS_FS - only enabling the cycle, time, and instret counters - change to use satp - rebase on u-boot/master - drop the patch "riscv: Pass correct exception code to _exit_trap()" - drop the patch "riscv: Refactor handle_trap() a little for future extension" - drop the patch "riscv: Allow U-Boot to run on hart 0 only", and leave the SMP support to Lukas's future patch series
Anup Patel (2): riscv: Introduce a Kconfig option for machine mode riscv: Implement riscv_get_time() API using rdtime instruction
Bin Meng (22): dm: cpu: Add timebase frequency to the platdata riscv: qemu: Create a simple-bus driver for the soc node cpu: Add a RISC-V CPU driver timer: Add generic driver for RISC-V privileged architecture defined timer riscv: ax25: Hide the ax25-specific Kconfig option riscv: Add a SYSCON driver for SiFive's Core Local Interruptor riscv: qemu: Add platform-specific Kconfig options riscv: Enlarge the default SYS_MALLOC_F_LEN riscv: Probe cpus during boot riscv: Remove non-DM version of print_cpuinfo() riscv: Add CSR numbers riscv: Add exception codes for xcause register riscv: Update supports_extension() to use desc from cpu driver riscv: Add indirect stringification to csr_xxx ops riscv: Do some basic architecture level cpu initialization riscv: Move trap handler codes to mtrap.S riscv: Fix context restore before returning from trap handler riscv: Return to previous privilege level after trap handling riscv: Adjust the _exit_trap() position to come before handle_trap() riscv: Save boot hart id to the global data riscv: bootm: Change to use boot_hart from global data riscv: Remove ae350.dts
Lukas Auer (1): riscv: add Kconfig entries for the code model
arch/riscv/Kconfig | 60 ++++++++- arch/riscv/Makefile | 9 +- arch/riscv/cpu/Makefile | 2 +- arch/riscv/cpu/ax25/Kconfig | 8 +- arch/riscv/cpu/cpu.c | 94 +++++++++----- arch/riscv/cpu/mtrap.S | 103 +++++++++++++++ arch/riscv/cpu/qemu/Kconfig | 12 ++ arch/riscv/cpu/qemu/cpu.c | 14 +++ arch/riscv/cpu/start.S | 93 +------------- arch/riscv/dts/ae350.dts | 229 --------------------------------- arch/riscv/include/asm/csr.h | 16 +-- arch/riscv/include/asm/encoding.h | 236 +++++++++++++++++++++++++++++++++++ arch/riscv/include/asm/global_data.h | 4 + arch/riscv/include/asm/syscon.h | 19 +++ arch/riscv/lib/Makefile | 2 + arch/riscv/lib/asm-offsets.c | 19 +++ arch/riscv/lib/bootm.c | 2 +- arch/riscv/lib/interrupts.c | 62 +++++---- arch/riscv/lib/rdtime.c | 38 ++++++ arch/riscv/lib/sifive_clint.c | 84 +++++++++++++ board/emulation/qemu-riscv/Kconfig | 1 + drivers/cpu/Kconfig | 6 + drivers/cpu/Makefile | 1 + drivers/cpu/riscv_cpu.c | 116 +++++++++++++++++ drivers/timer/Kconfig | 7 ++ drivers/timer/Makefile | 1 + drivers/timer/riscv_timer.c | 56 +++++++++ include/cpu.h | 3 + 28 files changed, 898 insertions(+), 399 deletions(-) create mode 100644 arch/riscv/cpu/mtrap.S create mode 100644 arch/riscv/cpu/qemu/Kconfig delete mode 100644 arch/riscv/dts/ae350.dts create mode 100644 arch/riscv/include/asm/syscon.h create mode 100644 arch/riscv/lib/asm-offsets.c create mode 100644 arch/riscv/lib/rdtime.c create mode 100644 arch/riscv/lib/sifive_clint.c create mode 100644 drivers/cpu/riscv_cpu.c create mode 100644 drivers/timer/riscv_timer.c