Add DMA functions to IRAM

CHANGELOG.md

@@ -43,6 +43,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - ESP32-S3: Added support for 80Mhz PSRAM (#1069)
 - ESP32-C3/S3: Add workaround for USB pin exchange on usb-serial-jtag (#1104).
 - ESP32C6: Added LP_UART initialization (#1113)
+- Add `optimize-spi-in-iram` feature to `esp-hal-common` (#1096)
+
 ### Changed
 
 - Set up interrupts for the DMA and async enabled peripherals only when `async` feature is provided (#1042)

esp-hal-common/src/spi/master.rs

@@ -1037,6 +1037,7 @@ pub mod dma {
         /// This will return a [SpiDmaTransfer] owning the buffer(s) and the SPI
         /// instance. The maximum amount of data to be sent is 32736
         /// bytes.
+        #[cfg_attr(feature = "optimize-spi-in-iram", ram)]
         pub fn dma_write<TXBUF>(
             mut self,
             words: TXBUF,
@@ -1063,6 +1064,7 @@ pub mod dma {
         /// This will return a [SpiDmaTransfer] owning the buffer(s) and the SPI
         /// instance. The maximum amount of data to be received is 32736
         /// bytes.
+        #[cfg_attr(feature = "optimize-spi-in-iram", ram)]
         pub fn dma_read<RXBUF>(
             mut self,
             mut words: RXBUF,
@@ -1129,6 +1131,7 @@ pub mod dma {
         C::P: SpiPeripheral,
         M: IsHalfDuplex,
     {
+        #[cfg_attr(feature = "optimize-spi-in-iram", ram)]
         pub fn read<RXBUF>(
             mut self,
             data_mode: SpiDataMode,
@@ -1202,6 +1205,7 @@ pub mod dma {
             })
         }
 
+        #[cfg_attr(feature = "optimize-spi-in-iram", ram)]
         pub fn write<TXBUF>(
             mut self,
             data_mode: SpiDataMode,
@@ -1846,6 +1850,7 @@ where
         Ok(words)
     }
 
+    #[cfg_attr(feature = "optimize-spi-in-iram", ram)]
     fn start_write_bytes_dma<'w>(
         &mut self,
         ptr: *const u8,
@@ -1876,6 +1881,7 @@ where
         Ok(())
     }
 
+    #[cfg_attr(feature = "optimize-spi-in-iram", ram)]
     fn start_read_bytes_dma<'w>(
         &mut self,
         ptr: *mut u8,