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@ -118,19 +118,23 @@
@@ -118,19 +118,23 @@
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# undef CONFIG_STM32_CCMEXCLUDE |
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# define CONFIG_STM32_CCMEXCLUDE 1 |
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/* All members of the STM32F20xxx and STM32F40xxx families have 192Kb in three banks:
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/* All members of the STM32F20xxx and STM32F40xxx families have 192KiB in three banks:
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* |
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* 1) 112Kb of System SRAM beginning at address 0x2000:0000 |
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* 2) 16Kb of System SRAM beginning at address 0x2001:c000 |
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* 3) 64Kb of CCM SRAM beginning at address 0x1000:0000 |
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* 1) 112KiB of System SRAM beginning at address 0x2000:0000 |
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* 2) 16KiB of System SRAM beginning at address 0x2001:c000 |
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* 3) 64KiB of CCM SRAM beginning at address 0x1000:0000 |
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* |
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* As determined by ld.script, g_heapbase lies in the 112Kb memory |
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* The STM32F427/437 have an additional 64KiB of System SRAM beginning at |
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* address 0x2002:0000 for a total of 256KiB. |
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* |
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* As determined by ld.script, g_heapbase lies in the 112KiB memory |
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* region and that extends to 0x2001:0000. But the first and second memory |
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* regions are contiguous and treated as one in this logic that extends to |
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* 0x2002:0000. |
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* 0x2002:0000 (or 0x2003:0000 for the F427/F437). |
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* |
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* As a complication, it appears that CCM SRAM cannot be used for DMA. So, if |
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* STM32 DMA is enabled, CCM SRAM should probably be excluded from the heap. |
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* As a complication, CCM SRAM cannot be used for DMA. So, if STM32 DMA is enabled,
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* CCM SRAM should probably be excluded from the heap or the application must take |
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* extra care to ensure that DMA buffers are not allocated in CCM SRAM. |
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* |
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* In addition, external FSMC SRAM may be available. |
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*/ |
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@ -147,7 +151,11 @@
@@ -147,7 +151,11 @@
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/* Set the end of system SRAM */ |
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# define SRAM1_END 0x20020000 |
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# if defined(CONFIG_STM32_STM32F427) |
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# define SRAM1_END 0x20030000 |
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# else |
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# define SRAM1_END 0x20020000 |
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# endif |
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/* Set the range of CCM SRAM as well (although we may not use it) */ |
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