diff options
| author | Alejandro Soto <alejandro@34project.org> | 2024-05-25 12:34:44 -0600 |
|---|---|---|
| committer | Alejandro Soto <alejandro@34project.org> | 2024-05-25 12:34:44 -0600 |
| commit | 98dd53d47b03b8263b98ac2806c354f5b018acd2 (patch) | |
| tree | 558a8727a93af57811159dc3a14b189e687b190d /rtl/gfx/firmware/gfx_bootrom.S | |
| parent | c2d178577ae7d9272d7aff35895a36aefe626eca (diff) | |
rtl/gfx/firmware: rename gfx_bootrom.S -> bootrom.S
Diffstat (limited to 'rtl/gfx/firmware/gfx_bootrom.S')
| -rw-r--r-- | rtl/gfx/firmware/gfx_bootrom.S | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/rtl/gfx/firmware/gfx_bootrom.S b/rtl/gfx/firmware/gfx_bootrom.S deleted file mode 100644 index 9079e31..0000000 --- a/rtl/gfx/firmware/gfx_bootrom.S +++ /dev/null @@ -1,76 +0,0 @@ -#include "custom_ops.S" - -.text - -.global _start -_start: - - li a0, 0x00300000 # HOST_CTRL_BASE - li a1, 1 << 1 | 1 << 0 # ARINT | AWINT - li a2, 1 << 0 # B.VALID = 1 - li a3, 0x8 # Firmware handover word - la a4, .read_data - li a5, 1 << 11 | 1 << 9 # CTRL.WVALID | CTRL.AWVALID - li a6, 1 << 12 # CTRL.BDONE, doesn't fit in andi - - sw a1, 0(a0) - -.wait_axi: - picorv32_waitirq_insn(zero) - - lw t0, 0(a0) - andi t1, t0, 1 << 8 # ARVALID - bne t1, zero, .read - and t0, t0, a5 - beq t0, a5, .write - j .wait_axi - -.read: - lw t0, 4(a0) - andi t1, t0, 1 << 0 # AW.VALID - beq t1, zero, .wait_axi - andi t0, t0, 0b11 << 2 - add t0, a4, t0 - lw t0, 0(t0) - sw t0, 12(a0) # R.DATA - -.read_done: - lw t0, 0(a0) - andi t0, t0, 1 << 10 # CTRL.RDONE - beq t0, zero, .read_done - j .wait_axi - -.write: - lw t0, 8(a0) - andi t1, t0, 1 << 0 # AW.VALID - beq t1, zero, .wait_axi - lw t1, 16(a0) - sw a2, 20(a0) - -.write_done: - lw t2, 0(a0) - and t2, t2, a6 - beq t2, zero, .write_done - - andi t0, t0, 0b111100 # Entendemos words 0-15 - bne t0, a3, .wait_axi - sw zero, 0(a0) - # Pass magic & hardware version - lw a0, 0(a4) - lw a1, 4(a4) - jalr t1 - j . - -.balign 4 - -.read_data: - # Magic - .word 0x4a7a7b0c - # Hardware major.minor.patch - .word 1 << 16 | 0 << 8 | 0 << 0 - # Firmware yyyy.mm.dd.build - .word 2024 << 19 | 5 << 15 | 12 << 10 | 1 << 0 - # Register map version, rev 0 means this is the bootrom firmware - .word 0 - -.balign 4 |