[PATCH 00/15] hw/riscv: sifive_u: Add GPIO and Mode Select (MSEL[3:0]) support

[Bin Meng <bmeng.cn@gmail.com>]

From: Bin Meng <bin.meng@windriver.com>

This series updates the 'sifive_u' machine support:

- Add GPIO controller support
- Support reboot functionality via GPIO pin#10
- Change SiFive E/U series CPU reset vector to 0x1004
- Support Mode Select (MSEL[3:0]) settings at 0x1000 via a new
  "msel" machine property
- Add a dummy DDR memory controller device

The series also does some clean-ups to the existing codes.

With this series, QEMU can boot U-Boot SPL built for SiFive FU540
all the way up to loading U-Boot proper from MMC:

$ qemu-system-riscv64 -nographic -M sifive_u,msel=6 -m 8G -bios u-boot-spl.bin

U-Boot SPL 2020.07-rc3-00208-g88bd5b1 (Jun 08 2020 - 20:16:10 +0800)
Trying to boot from MMC1
Unhandled exception: Load access fault
EPC: 0000000008009be6 TVAL: 0000000010050014

The last big gap for the 'sifive_u' machine is the QSPI modeling.


Bin Meng (15):
  hw/riscv: sifive_e: Remove the riscv_ prefix of the machine* and soc*
    functions
  hw/riscv: opentitan: Remove the riscv_ prefix of the machine* and soc*
    functions
  hw/riscv: sifive_u: Simplify the GEM IRQ connect code a little bit
  hw/riscv: sifive_u: Generate device tree node for OTP
  hw/riscv: sifive_gpio: Clean up the codes
  hw/riscv: sifive_gpio: Add a new 'ngpio' property
  hw/riscv: sifive_u: Hook a GPIO controller
  hw/riscv: sifive_gpio: Do not blindly trigger output IRQs
  hw/riscv: sifive_u: Add reset functionality
  hw/riscv: sifive_u: Rename serial property get/set functions to a
    generic name
  hw/riscv: sifive_u: Add a new property msel for MSEL pin state
  hw/riscv: sifive: Change SiFive E/U CPU reset vector to 0x1004
  hw/riscv: sifive_u: Support different boot source per MSEL pin state
  hw/riscv: sifive_u: Sort the SoC memmap table entries
  hw/riscv: sifive_u: Add a dummy DDR memory controller device

 hw/riscv/opentitan.c           |  29 ++++----
 hw/riscv/sifive_e.c            |  32 +++++----
 hw/riscv/sifive_gpio.c         |  45 +++++++-----
 hw/riscv/sifive_u.c            | 158 ++++++++++++++++++++++++++++++++++-------
 include/hw/riscv/sifive_gpio.h |   8 ++-
 include/hw/riscv/sifive_u.h    |  27 +++++++
 target/riscv/cpu.c             |   4 +-
 7 files changed, 223 insertions(+), 80 deletions(-)

-- 
2.7.4