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Re: changing the memory on the linux synthetic target
- From: Bart Veer <bartv at redhat dot com>
- To: tom dot coremans at acunia dot com
- Cc: ecos-discuss at sources dot redhat dot com
- Date: Tue, 5 Mar 2002 19:22:55 GMT
- Subject: Re: [ECOS] changing the memory on the linux synthetic target
- References: <3C84B052.4C1AAAB8@acunia.com>
- Reply-to: bartv at redhat dot com
>>>>> "Tom" == Tom Coremans <tom.coremans@acunia.com> writes:
Tom> I tried to change the amount of memory available for ecos
Tom> running on the linux synthetic target by changing the values
Tom> of LENGTH in the file
Tom> mlt_synth_i386_rom.ldi :
Tom> MEMORY
Tom> {
Tom> rom : ORIGIN = 0x1000000, LENGTH = 0x800000
Tom> ram : ORIGIN = 0x2000000, LENGTH = 0x800000
Tom> }
Tom> and by changing the value of ram_SIZE in the file
Tom> mlt_synth_i386_rom.h:
Tom> #define CYGMEM_REGION_ram (0x2000000)
Tom> #define CYGMEM_REGION_ram_SIZE (0x800000)
Tom> #define CYGMEM_REGION_ram_ATTR (CYGMEM_REGION_ATTR_R |
Tom> CYGMEM_REGION_ATTR_W)
Tom> but I still have only 8Meg available for the malloc function.
Tom> Does anybody know what else I should chamge to make this
Tom> work??
I am not totally sure, but one possibility is another change to
mlt_synth_i386_rom.h:
-#define CYGMEM_SECTION_heap1_SIZE (0x2800000 - (size_t) CYG_LABEL_NAME (__heap1))
+#define CYGMEM_SECTION_heap1_SIZE (0x3000000 - (size_t) CYG_LABEL_NAME (__heap1))
Alternatively you could calculate the heap size from CYGMEM_REGION_ram
and CYGMEM_REGION_ram_SIZE, but that would hinder people who need
a region of memory that is not in the heap.
Bart
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