6 Commits

Author	SHA1	Message	Date
Lephe	03ef59521c	dma: add support for standard DMA access to SPU memory ... * Mark SPU memory as sleep-blocking. * Perform 4-byte accesses only in dma_memset() and dma_memcpy() (32-byte accesses freeze as one would expect). This change does *NOT* implement support for SPU's integrated DMAC.	2021-06-17 14:32:27 +02:00
Lephe	acc35d774f	dma: add an asynchronous API ... This change adds asynchronous capabilities to the DMA API. Previously, transfers would start asynchronously but could only be completed by a call to dma_transfer_wait(). The API now supports a callback, as well as the dma_transfer_sync() variant, to be consistent with the upcoming USB API that has both _sync and _async versions of functions. The interrupt handler of the DMA was changed to include a return to userland, which is required to perform the callback. * dma_transfer() is now an obsolete synonym for dma_transfer_async() with no callback. * dma_transfer_noint() is now a synonym for dma_transfer_atomic(), for consistency with the upcoming USB API.	2021-05-12 09:17:24 +02:00
Lephe	fc7aab6eba	dma: finalize dma_memset() and dma_memcpy() ... Adds support for dma_memcpy(), and uses a proper ILRAM allocation scheme (static linking here) for the temporary buffer in dma_memset().	2019-09-15 19:30:57 +02:00
Lephe	bb77e4588d	dma: fix freezes when transferring to/from IL memory ... The IL memory is unavailable when the processor goes to sleep, causing any involved DMA transfer to stall. The dma_transfer_wait() normally sleeps to save battery power, but this causes the whole system to freeze and never wake up. This change lets dma_transfer_wait() decide dynamically whether to sleep or spinlock. There is no concrete improvement over dma_transfer_noint() when using IL memory, but it makes dma_transfer() fully generic. Obviously the same goes for X and Y memory.	2019-09-15 15:20:23 +02:00
lephe	e1aca8d89b	exc: add exception handlers, use them in the DMA ... This change introduces exception handlers that default to a fatal error with an on-screen description of the exception and some debugging information. It also adds the dprint() function as a definitely-needed helper and removes bootlog_unmapped() by using the exception handler for the fatal error display. (Also printf() is now required in all gint add-ins; this is sad, but space is not as much of a constraint as debugging.) Finally, the exception handler is used to handle an interrupt which is an exception in practice, the DMA address error. On fx-CG 50, additional DMA-related information is displayed on the screen. This is left out on fx-9860G as there is not enough space.	2019-09-03 22:15:00 +02:00
lephe	6d54a5fe0a	dma: add exception handler and dma_memset()	2019-08-27 21:18:44 +02:00