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refactor sram buffer copy functions

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This commit is contained in:
optixx
2009-08-24 22:13:59 +02:00
parent d1415c6283
commit d8b23614d7
4 changed files with 30 additions and 19 deletions
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31
avr/usbload/shared_memory.c
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@@ -47,11 +47,11 @@ uint8_t scratchpad_locked_tx = 1;
uint8_t shared_memory_scratchpad_region_save_helper(uint32_t addr){
if(addr > (SHARED_MEM_TX_LOC_STATE + SHARED_MEM_TX_LOC_SIZE )){
if(addr > (SHARED_MEM_TX_LOC_STATE + SHARED_MEM_TX_LOC_SIZE ) && scratchpad_locked_tx){
shared_memory_scratchpad_region_tx_save();
return 0;
}
if(addr > (SHARED_MEM_RX_LOC_STATE + SHARED_MEM_RX_LOC_SIZE )){
if(addr > (SHARED_MEM_RX_LOC_STATE + SHARED_MEM_RX_LOC_SIZE ) && scratchpad_locked_rx){
shared_memory_scratchpad_region_rx_save();
return 0;
}
@@ -62,28 +62,33 @@ uint8_t shared_memory_scratchpad_region_save_helper(uint32_t addr){
void shared_memory_scratchpad_region_tx_save()
{
debug(DEBUG_SHM,"shared_memory_scratchpad_region_tx_save: unlock\n");
sram_bulk_read_buffer(SHARED_MEM_TX_LOC_STATE,scratchpad_region_tx,SHARED_MEM_TX_LOC_SIZE);
sram_bulk_copy_into_buffer(SHARED_MEM_TX_LOC_STATE,scratchpad_region_tx,SHARED_MEM_TX_LOC_SIZE);
scratchpad_locked_tx = 0;
}
void shared_memory_scratchpad_region_tx_restore()
{
debug(DEBUG_SHM,"shared_memory_scratchpad_region_tx_restore: lock\n");
sram_bulk_copy(SHARED_MEM_TX_LOC_STATE,scratchpad_region_tx,SHARED_MEM_TX_LOC_SIZE);
scratchpad_locked_tx = 1;
}
void shared_memory_scratchpad_region_rx_save()
{
debug(DEBUG_SHM,"shared_memory_scratchpad_region_rx_save: unlock\n");
sram_bulk_read_buffer(SHARED_MEM_RX_LOC_STATE,scratchpad_region_rx,SHARED_MEM_RX_LOC_SIZE);
sram_bulk_copy_into_buffer(SHARED_MEM_RX_LOC_STATE,scratchpad_region_rx,SHARED_MEM_RX_LOC_SIZE);
scratchpad_locked_rx = 0;
}
void shared_memory_scratchpad_region_tx_restore()
{
if (scratchpad_locked_tx)
return;
debug(DEBUG_SHM,"shared_memory_scratchpad_region_tx_restore: lock\n");
sram_bulk_copy_from_buffer(SHARED_MEM_TX_LOC_STATE,scratchpad_region_tx,SHARED_MEM_TX_LOC_SIZE);
scratchpad_locked_tx = 1;
}
void shared_memory_scratchpad_region_rx_restore()
{
if (scratchpad_locked_rx)
return;
debug(DEBUG_SHM,"shared_memory_scratchpad_region_tx_save: lock\n");
sram_bulk_copy(SHARED_MEM_RX_LOC_STATE,scratchpad_region_rx,SHARED_MEM_RX_LOC_SIZE);
sram_bulk_copy_from_buffer(SHARED_MEM_RX_LOC_STATE,scratchpad_region_rx,SHARED_MEM_RX_LOC_SIZE);
scratchpad_locked_rx = 1;
}
@@ -193,7 +198,7 @@ int shared_memory_read(uint8_t *cmd, uint8_t *len,uint8_t *buffer)
debug(DEBUG_SHM,"shared_memory_read: 0x%04x=0x%02x 0x%04x=0x%02x \n",
SHARED_MEM_RX_LOC_CMD, *cmd, SHARED_MEM_RX_LOC_LEN, *len);
sram_bulk_read_buffer(SHARED_MEM_RX_LOC_PAYLOAD,buffer, *len);
sram_bulk_copy_into_buffer(SHARED_MEM_RX_LOC_PAYLOAD,buffer, *len);
sram_write(SHARED_MEM_RX_LOC_STATE, SHARED_MEM_RX_AVR_RTS);
snes_hirom();