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| author | Philipp Hug <philipp@hug.cx> | 2018-09-13 18:11:56 +0200 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2018-09-14 09:28:06 +0000 |
| commit | 199b75f58a0ffc2ad0871eb4853ca425c78b4893 (patch) | |
| tree | fdd1d98ffa45c1e02372f5528f414008de498911 /src/soc | |
| parent | 31dbfbc405ba7b26cacd2cfcaeff95e52d60ad99 (diff) | |
| download | coreboot-199b75f58a0ffc2ad0871eb4853ca425c78b4893.tar.xz | |
arch/riscv: provide a monotonic timer
The RISC-V Privileged Architecture specification defines the Machine
Time Registers (mtime and mtimecmp) in section 3.1.15.
Makes it possible to use the generic udelay.
The timer is enabled using RISCV_USE_ARCH_TIMER for the lowrisc,
sifive and ucb soc.
Change-Id: I5139601226e6f89da69e302a10f2fb56b4b24f38
Signed-off-by: Philipp Hug <philipp@hug.cx>
Reviewed-on: https://review.coreboot.org/27434
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/lowrisc/lowrisc/Kconfig | 3 | ||||
| -rw-r--r-- | src/soc/sifive/fu540/Kconfig | 4 | ||||
| -rw-r--r-- | src/soc/ucb/riscv/Kconfig | 3 |
3 files changed, 10 insertions, 0 deletions
diff --git a/src/soc/lowrisc/lowrisc/Kconfig b/src/soc/lowrisc/lowrisc/Kconfig index 71078b5c25..8b35231642 100644 --- a/src/soc/lowrisc/lowrisc/Kconfig +++ b/src/soc/lowrisc/lowrisc/Kconfig @@ -6,6 +6,9 @@ config SOC_LOWRISC_LOWRISC select ARCH_RAMSTAGE_RISCV select BOOTBLOCK_CONSOLE select DRIVERS_UART_8250MEM_32 + select GENERIC_UDELAY + select HAVE_MONOTONIC_TIMER + select RISCV_USE_ARCH_TIMER bool default n diff --git a/src/soc/sifive/fu540/Kconfig b/src/soc/sifive/fu540/Kconfig index 457d16bb4e..bee8292199 100644 --- a/src/soc/sifive/fu540/Kconfig +++ b/src/soc/sifive/fu540/Kconfig @@ -20,7 +20,11 @@ config SOC_SIFIVE_FU540 select ARCH_RAMSTAGE_RISCV select BOOTBLOCK_CONSOLE select DRIVERS_UART_SIFIVE + select GENERIC_UDELAY + select HAVE_MONOTONIC_TIMER + select RISCV_USE_ARCH_TIMER select UART_OVERRIDE_REFCLK + if SOC_SIFIVE_FU540 config RISCV_ARCH diff --git a/src/soc/ucb/riscv/Kconfig b/src/soc/ucb/riscv/Kconfig index 2a73f5c284..26adb56bfe 100644 --- a/src/soc/ucb/riscv/Kconfig +++ b/src/soc/ucb/riscv/Kconfig @@ -5,6 +5,9 @@ config SOC_UCB_RISCV select ARCH_ROMSTAGE_RISCV select ARCH_RAMSTAGE_RISCV select BOOTBLOCK_CONSOLE + select GENERIC_UDELAY + select HAVE_MONOTONIC_TIMER + select RISCV_USE_ARCH_TIMER bool default n |