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Add a configuration option for dynamic stack management

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This commit is contained in:
Gregory Nutt 2014-09-13 12:25:32 -06:00
parent fe48417a96
commit f4bcb27962
4 changed files with 41 additions and 19 deletions
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31
arch/Kconfig
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@ -199,11 +199,6 @@ config ARCH_HEAP_VBASE
---help---
The virtual address of the beginning of the heap region.
config ARCH_STACK_VBASE
hex "Virtual stack base"
---help---
The virtual address of the beginning the stack region
config ARCH_TEXT_NPAGES
int "Max .text pages"
default 1
@ -228,6 +223,30 @@ config ARCH_HEAP_NPAGES
This, along with knowledge of the page size, determines the size of
the heap virtual address space. Default is 1.
config ARCH_STACK_DYNAMIC
bool "Dynamic stack"
default n if !BUILD_KERNEL || !LIBC_EXECFUNCS
default y if BUILD_KERNEL && LIBC_EXECFUNCS
---help---
Select this option if the user process stack resides in its own
address space. The naming of this selection implies that dynamic
stack allocation is supported. Certainly this option must be set if
dynamic stack allocation is supported by a platform. But the more
general meaning of this configuration environment is simply that the
stack has its own address space.
NOTE: This options is also *required* if BUILD_KERNEL and
LIBC_EXECFUNCS are selected. Why? Because the caller's stack must
be preserved in its own address space when we instantiate the
environment of the new process in order to initialize it.
if ARCH_STACK_DYNAMIC
config ARCH_STACK_VBASE
hex "Virtual stack base"
---help---
The virtual address of the beginning the stack region
config ARCH_STACK_NPAGES
int "Max. stack pages"
default 1
@ -236,6 +255,8 @@ config ARCH_STACK_NPAGES
This, along with knowledge of the page size, determines the size of
the stack virtual address space. Default is 1.
endif # ARCH_STACK_DYNAMIC
config ARCH_PGPOOL_MAPPING
bool "Have page pool mapping"
default n

18
arch/arm/include/arch.h
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@ -99,17 +99,19 @@ do { \
/* Convert 4KiB pages to 1MiB sections */
# define __PG2SECT_SHIFT (20 - MM_PGSHIFT)
# define __PG2SECT_MASK ((1 << __PG2SECT_SHIFT) - 1)
# define __PG2SECT_SHIFT (20 - MM_PGSHIFT)
# define __PG2SECT_MASK ((1 << __PG2SECT_SHIFT) - 1)
# define ARCH_PG2SECT(p) (((p) + __PG2SECT_MASK) >> __PG2SECT_SHIFT)
# define ARCH_SECT2PG(s) ((s) << __PG2SECT_SHIFT)
# define ARCH_PG2SECT(p) (((p) + __PG2SECT_MASK) >> __PG2SECT_SHIFT)
# define ARCH_SECT2PG(s) ((s) << __PG2SECT_SHIFT)
# define ARCH_TEXT_NSECTS ARCH_PG2SECT(CONFIG_ARCH_TEXT_NPAGES)
# define ARCH_DATA_NSECTS ARCH_PG2SECT(CONFIG_ARCH_DATA_NPAGES)
# define ARCH_HEAP_NSECTS ARCH_PG2SECT(CONFIG_ARCH_HEAP_NPAGES)
# define ARCH_STACK_NSECTS ARCH_PG2SECT(CONFIG_ARCH_STACK_NPAGES)
# define ARCH_TEXT_NSECTS ARCH_PG2SECT(CONFIG_ARCH_TEXT_NPAGES)
# define ARCH_DATA_NSECTS ARCH_PG2SECT(CONFIG_ARCH_DATA_NPAGES)
# define ARCH_HEAP_NSECTS ARCH_PG2SECT(CONFIG_ARCH_HEAP_NPAGES)
# ifdef CONFIG_ARCH_STACK_DYNAMIC
# define ARCH_STACK_NSECTS ARCH_PG2SECT(CONFIG_ARCH_STACK_NPAGES)
# endif
#endif
/****************************************************************************

4
arch/arm/src/armv7-a/arm_addrenv.c
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@ -104,10 +104,6 @@
# error CONFIG_ARCH_HEAP_VBASE not aligned to section boundary
#endif
#if (CONFIG_ARCH_STACK_VBASE & SECTION_MASK) != 0
# error CONFIG_ARCH_STACK_VBASE not aligned to section boundary
#endif
/* Using a 4KiB page size, each 1MiB section maps to a PTE containing
* 256*2KiB entries
*/

7
arch/arm/src/sama5/sam_pgalloc.c
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@ -137,8 +137,11 @@ uintptr_t sam_physpgaddr(uintptr_t vaddr)
if ((vaddr >= CONFIG_ARCH_TEXT_VBASE && vaddr < ARCH_TEXT_VEND) ||
(vaddr >= CONFIG_ARCH_DATA_VBASE && vaddr < ARCH_DATA_VEND) ||
(vaddr >= CONFIG_ARCH_HEAP_VBASE && vaddr < ARCH_HEAP_VEND) ||
(vaddr >= CONFIG_ARCH_STACK_VBASE && vaddr < ARCH_STACK_VEND))
(vaddr >= CONFIG_ARCH_HEAP_VBASE && vaddr < ARCH_HEAP_VEND)
#ifdef CONFIG_ARCH_STACK_DYNAMIC
|| (vaddr >= CONFIG_ARCH_STACK_VBASE && vaddr < ARCH_STACK_VEND)
#endif
)
{
/* Yes.. Get Level 1 page table entry corresponding to this virtual
* address.