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Merge pull request #1536 from embassy-rs/rp-flash-fix

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Rp flash fix
This commit is contained in:
Dario Nieuwenhuis 2023-06-05 22:16:44 +00:00 committed by GitHub
commit 79b982c941
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 53 additions and 41 deletions
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5
embassy-rp/Cargo.toml
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@ -41,6 +41,11 @@ boot2-ram-memcpy = []
boot2-w25q080 = []
boot2-w25x10cl = []
# Indicate code is running from RAM.
# Set this if all code is in RAM, and the cores never access memory-mapped flash memory through XIP.
# This allows the flash driver to not force pausing execution on both cores when doing flash operations.
run-from-ram = []
# Enable nightly-only features
nightly = ["embassy-executor/nightly", "embedded-hal-1", "embedded-hal-async", "embassy-embedded-hal/nightly", "dep:embassy-usb-driver", "dep:embedded-io"]

5
embassy-rp/src/dma.rs
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@ -75,16 +75,17 @@ pub unsafe fn write<'a, C: Channel, W: Word>(
)
}
static DUMMY: u32 = 0;
pub unsafe fn write_repeated<'a, C: Channel, W: Word>(
ch: impl Peripheral<P = C> + 'a,
to: *mut W,
len: usize,
dreq: u8,
) -> Transfer<'a, C> {
let dummy: u32 = 0;
copy_inner(
ch,
&dummy as *const u32,
&DUMMY as *const u32,
to as *mut u32,
len,
W::size(),

82
embassy-rp/src/flash.rs
View File

@ -9,7 +9,11 @@ use embedded_storage::nor_flash::{
use crate::pac;
use crate::peripherals::FLASH;
pub const FLASH_BASE: usize = 0x10000000;
pub const FLASH_BASE: *const u32 = 0x10000000 as _;
// If running from RAM, we might have no boot2. Use bootrom `flash_enter_cmd_xip` instead.
// TODO: when run-from-ram is set, completely skip the "pause cores and jumpp to RAM" dance.
pub const USE_BOOT2: bool = !cfg!(feature = "run-from-ram");
// **NOTE**:
//
@ -63,8 +67,8 @@ impl<'d, T: Instance, const FLASH_SIZE: usize> Flash<'d, T, FLASH_SIZE> {
pub fn read(&mut self, offset: u32, bytes: &mut [u8]) -> Result<(), Error> {
trace!(
"Reading from 0x{:x} to 0x{:x}",
FLASH_BASE + offset as usize,
FLASH_BASE + offset as usize + bytes.len()
FLASH_BASE as u32 + offset,
FLASH_BASE as u32 + offset + bytes.len() as u32
);
check_read(self, offset, bytes.len())?;
@ -89,7 +93,7 @@ impl<'d, T: Instance, const FLASH_SIZE: usize> Flash<'d, T, FLASH_SIZE> {
let len = to - from;
unsafe { self.in_ram(|| ram_helpers::flash_range_erase(from, len, true))? };
unsafe { self.in_ram(|| ram_helpers::flash_range_erase(from, len))? };
Ok(())
}
@ -114,7 +118,7 @@ impl<'d, T: Instance, const FLASH_SIZE: usize> Flash<'d, T, FLASH_SIZE> {
let unaligned_offset = offset as usize - start;
unsafe { self.in_ram(|| ram_helpers::flash_range_program(unaligned_offset as u32, &pad_buf, true))? }
unsafe { self.in_ram(|| ram_helpers::flash_range_program(unaligned_offset as u32, &pad_buf))? }
}
let remaining_len = bytes.len() - start_padding;
@ -132,12 +136,12 @@ impl<'d, T: Instance, const FLASH_SIZE: usize> Flash<'d, T, FLASH_SIZE> {
if bytes.as_ptr() as usize >= 0x2000_0000 {
let aligned_data = &bytes[start_padding..end_padding];
unsafe { self.in_ram(|| ram_helpers::flash_range_program(aligned_offset as u32, aligned_data, true))? }
unsafe { self.in_ram(|| ram_helpers::flash_range_program(aligned_offset as u32, aligned_data))? }
} else {
for chunk in bytes[start_padding..end_padding].chunks_exact(PAGE_SIZE) {
let mut ram_buf = [0xFF_u8; PAGE_SIZE];
ram_buf.copy_from_slice(chunk);
unsafe { self.in_ram(|| ram_helpers::flash_range_program(aligned_offset as u32, &ram_buf, true))? }
unsafe { self.in_ram(|| ram_helpers::flash_range_program(aligned_offset as u32, &ram_buf))? }
aligned_offset += PAGE_SIZE;
}
}
@ -152,7 +156,7 @@ impl<'d, T: Instance, const FLASH_SIZE: usize> Flash<'d, T, FLASH_SIZE> {
let unaligned_offset = end_offset - (PAGE_SIZE - rem_offset);
unsafe { self.in_ram(|| ram_helpers::flash_range_program(unaligned_offset as u32, &pad_buf, true))? }
unsafe { self.in_ram(|| ram_helpers::flash_range_program(unaligned_offset as u32, &pad_buf))? }
}
Ok(())
@ -190,7 +194,7 @@ impl<'d, T: Instance, const FLASH_SIZE: usize> Flash<'d, T, FLASH_SIZE> {
/// Read SPI flash unique ID
pub fn unique_id(&mut self, uid: &mut [u8]) -> Result<(), Error> {
unsafe { self.in_ram(|| ram_helpers::flash_unique_id(uid, true))? };
unsafe { self.in_ram(|| ram_helpers::flash_unique_id(uid))? };
Ok(())
}
@ -199,7 +203,7 @@ impl<'d, T: Instance, const FLASH_SIZE: usize> Flash<'d, T, FLASH_SIZE> {
let mut jedec = None;
unsafe {
self.in_ram(|| {
jedec.replace(ram_helpers::flash_jedec_id(true));
jedec.replace(ram_helpers::flash_jedec_id());
})?;
};
Ok(jedec.unwrap())
@ -242,6 +246,7 @@ impl<'d, T: Instance, const FLASH_SIZE: usize> NorFlash for Flash<'d, T, FLASH_S
mod ram_helpers {
use core::marker::PhantomData;
use super::*;
use crate::rom_data;
#[repr(C)]
@ -306,7 +311,7 @@ mod ram_helpers {
///
/// `addr` and `len` must be multiples of 4096
///
/// If `use_boot2` is `true`, a copy of the 2nd stage boot loader
/// If `USE_BOOT2` is `true`, a copy of the 2nd stage boot loader
/// is used to re-initialize the XIP engine after flashing.
///
/// # Safety
@ -318,10 +323,10 @@ mod ram_helpers {
/// - DMA must not access flash memory
///
/// `addr` and `len` parameters must be valid and are not checked.
pub unsafe fn flash_range_erase(addr: u32, len: u32, use_boot2: bool) {
pub unsafe fn flash_range_erase(addr: u32, len: u32) {
let mut boot2 = [0u32; 256 / 4];
let ptrs = if use_boot2 {
rom_data::memcpy44(&mut boot2 as *mut _, super::FLASH_BASE as *const _, 256);
let ptrs = if USE_BOOT2 {
rom_data::memcpy44(&mut boot2 as *mut _, FLASH_BASE, 256);
flash_function_pointers_with_boot2(true, false, &boot2)
} else {
flash_function_pointers(true, false)
@ -336,7 +341,7 @@ mod ram_helpers {
///
/// `addr` and `data.len()` must be multiples of 4096
///
/// If `use_boot2` is `true`, a copy of the 2nd stage boot loader
/// If `USE_BOOT2` is `true`, a copy of the 2nd stage boot loader
/// is used to re-initialize the XIP engine after flashing.
///
/// # Safety
@ -348,10 +353,10 @@ mod ram_helpers {
/// - DMA must not access flash memory
///
/// `addr` and `len` parameters must be valid and are not checked.
pub unsafe fn flash_range_erase_and_program(addr: u32, data: &[u8], use_boot2: bool) {
pub unsafe fn flash_range_erase_and_program(addr: u32, data: &[u8]) {
let mut boot2 = [0u32; 256 / 4];
let ptrs = if use_boot2 {
rom_data::memcpy44(&mut boot2 as *mut _, super::FLASH_BASE as *const _, 256);
let ptrs = if USE_BOOT2 {
rom_data::memcpy44(&mut boot2 as *mut _, FLASH_BASE, 256);
flash_function_pointers_with_boot2(true, true, &boot2)
} else {
flash_function_pointers(true, true)
@ -371,7 +376,7 @@ mod ram_helpers {
///
/// `addr` and `data.len()` must be multiples of 256
///
/// If `use_boot2` is `true`, a copy of the 2nd stage boot loader
/// If `USE_BOOT2` is `true`, a copy of the 2nd stage boot loader
/// is used to re-initialize the XIP engine after flashing.
///
/// # Safety
@ -383,10 +388,10 @@ mod ram_helpers {
/// - DMA must not access flash memory
///
/// `addr` and `len` parameters must be valid and are not checked.
pub unsafe fn flash_range_program(addr: u32, data: &[u8], use_boot2: bool) {
pub unsafe fn flash_range_program(addr: u32, data: &[u8]) {
let mut boot2 = [0u32; 256 / 4];
let ptrs = if use_boot2 {
rom_data::memcpy44(&mut boot2 as *mut _, super::FLASH_BASE as *const _, 256);
let ptrs = if USE_BOOT2 {
rom_data::memcpy44(&mut boot2 as *mut _, FLASH_BASE, 256);
flash_function_pointers_with_boot2(false, true, &boot2)
} else {
flash_function_pointers(false, true)
@ -508,10 +513,10 @@ mod ram_helpers {
/// - DMA must not access flash memory
///
/// Credit: taken from `rp2040-flash` (also licensed Apache+MIT)
pub unsafe fn flash_unique_id(out: &mut [u8], use_boot2: bool) {
pub unsafe fn flash_unique_id(out: &mut [u8]) {
let mut boot2 = [0u32; 256 / 4];
let ptrs = if use_boot2 {
rom_data::memcpy44(&mut boot2 as *mut _, 0x10000000 as *const _, 256);
let ptrs = if USE_BOOT2 {
rom_data::memcpy44(&mut boot2 as *mut _, FLASH_BASE, 256);
flash_function_pointers_with_boot2(false, false, &boot2)
} else {
flash_function_pointers(false, false)
@ -536,10 +541,10 @@ mod ram_helpers {
/// - DMA must not access flash memory
///
/// Credit: taken from `rp2040-flash` (also licensed Apache+MIT)
pub unsafe fn flash_jedec_id(use_boot2: bool) -> u32 {
pub unsafe fn flash_jedec_id() -> u32 {
let mut boot2 = [0u32; 256 / 4];
let ptrs = if use_boot2 {
rom_data::memcpy44(&mut boot2 as *mut _, 0x10000000 as *const _, 256);
let ptrs = if USE_BOOT2 {
rom_data::memcpy44(&mut boot2 as *mut _, FLASH_BASE, 256);
flash_function_pointers_with_boot2(false, false, &boot2)
} else {
flash_function_pointers(false, false)
@ -586,7 +591,6 @@ mod ram_helpers {
"ldr r4, [r5, #4]",
"blx r4", // flash_exit_xip()
"mov r7, r10", // cmd
"movs r4, #0x18",
"lsls r4, r4, #24", // 0x18000000, SSI, RP2040 datasheet 4.10.13
@ -603,8 +607,9 @@ mod ram_helpers {
"str r1, [r4, #0]",
// Write ctrlr1 with len-1
"ldr r0, [r7, #8]", // dummy_len
"ldr r1, [r7, #16]", // data_len
"mov r3, r10", // cmd
"ldr r0, [r3, #8]", // dummy_len
"ldr r1, [r3, #16]", // data_len
"add r0, r1",
"subs r0, #1",
"str r0, [r4, #0x04]", // CTRLR1
@ -616,8 +621,8 @@ mod ram_helpers {
// Write cmd/addr phase to DR
"mov r2, r4",
"adds r2, 0x60", // &DR
"ldr r0, [r7, #0]", // cmd_addr
"ldr r1, [r7, #4]", // cmd_addr_len
"ldr r0, [r3, #0]", // cmd_addr
"ldr r1, [r3, #4]", // cmd_addr_len
"10:",
"ldrb r3, [r0]",
"strb r3, [r2]", // DR
@ -626,7 +631,8 @@ mod ram_helpers {
"bne 10b",
// Skip any dummy cycles
"ldr r1, [r7, #8]", // dummy_len
"mov r3, r10", // cmd
"ldr r1, [r3, #8]", // dummy_len
"cmp r1, #0",
"beq 9f",
"4:",
@ -643,8 +649,9 @@ mod ram_helpers {
// Read RX fifo
"9:",
"ldr r0, [r7, #12]", // data
"ldr r1, [r7, #16]", // data_len
"mov r2, r10", // cmd
"ldr r0, [r2, #12]", // data
"ldr r1, [r2, #16]", // data_len
"2:",
"ldr r3, [r4, #0x28]", // SR
@ -678,13 +685,12 @@ mod ram_helpers {
out("r2") _,
out("r3") _,
out("r4") _,
out("r5") _,
// Registers r8-r10 are used to store values
// from r0-r2 in registers not clobbered by
// function calls.
// The values can't be passed in using r8-r10 directly
// due to https://github.com/rust-lang/rust/issues/99071
out("r8") _,
out("r9") _,
out("r10") _,
clobber_abi("C"),
);

2
tests/rp/Cargo.toml
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@ -10,7 +10,7 @@ teleprobe-meta = "1"
embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
embassy-executor = { version = "0.2.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
embassy-time = { version = "0.1.0", path = "../../embassy-time", features = ["defmt"] }
embassy-rp = { version = "0.1.0", path = "../../embassy-rp", features = ["nightly", "defmt", "unstable-pac", "unstable-traits", "time-driver", "critical-section-impl", "intrinsics", "rom-v2-intrinsics"] }
embassy-rp = { version = "0.1.0", path = "../../embassy-rp", features = ["nightly", "defmt", "unstable-pac", "unstable-traits", "time-driver", "critical-section-impl", "intrinsics", "rom-v2-intrinsics", "run-from-ram"] }
embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
defmt = "0.3.0"