From f3427f57661698850483d9638892a7c25456078c Mon Sep 17 00:00:00 2001 From: patacongo Date: Fri, 22 Mar 2013 18:26:03 +0000 Subject: Fix some errors in stm32_allocateheap.c for STM32 F1 and F3 that crept in recently git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5776 42af7a65-404d-4744-a932-0658087f49c3 --- nuttx/configs/sam3u-ek/scripts/memory.ld | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) (limited to 'nuttx/configs/sam3u-ek/scripts') diff --git a/nuttx/configs/sam3u-ek/scripts/memory.ld b/nuttx/configs/sam3u-ek/scripts/memory.ld index f88c4c80b..13405f408 100644 --- a/nuttx/configs/sam3u-ek/scripts/memory.ld +++ b/nuttx/configs/sam3u-ek/scripts/memory.ld @@ -33,17 +33,30 @@ * ****************************************************************************/ -/* The AT91SAM3U-4 has 256Kb of FLASH beginning at address 0x0008:0000, - * 32Kb of SRAM beginning at address 0x2000:0000, and 16Kb of SRAM beginning +/* The AT91SAM3U-4 has 256KB of FLASH beginning at address 0x0008:0000, + * 32KB of SRAM beginning at address 0x2000:0000, and 16Kb of SRAM beginning * at address 0x2008:000 (used only for heap). When booting from FLASH, * FLASH memory is aliased to address 0x0000:0000 where the code expects to * begin execution by jumping to the entry point in the 0x0800:0000 address * range. * - * For MPU support, the kernel-mode NuttX section is assumed to be 64Kb of - * FLASH and 4Kb of SRAM. That, of course, can be optimized as needed (See - * also configs/open1788/scripts/kernel-space.ld). A detailed memory map - * for the CPU SRAM region is as follows: + * For MPU support, the kernel-mode NuttX section is assumed to be 64KB of + * FLASH and 4KB of SRAM. That, of course, can be optimized as needed (See + * also configs/open1788/scripts/kernel-space.ld). + * + * Alignment of the user space FLASH partition is a critical factor: The + * user space FLASH partition will be spanned with a single region of size + * 2**n bytes. The alignment of the user-space region must be the same. As + * a consequence, as the user-space increases in size, the alignmment + * requirement also increases. + * + * This alignment requirement means that the largest user space FLASH region + * you can have will be 2128KB at it would have to be positioned at + * 0x000a0000. If you change this address, don't forget to chagne the + * CONFIG_NUTTX_USERSPACE configuration setting to match and to modify + * the check in kernel/userspace.c. + * + * A detailed memory map for the 16Kb SRAM region is as follows: * * 0x20000 0000: Kernel .data region. Typical size: 0.1KB * ------- ---- Kernel .bss region. Typical size: 1.8KB -- cgit v1.2.3