Memory maps – Comtrol eCos User Manual
Page 240
Chapter 5. Installation and Testing
#define CYGNUM_HAL_INTERRUPT_BIU_ERR
17
#define CYGNUM_HAL_INTERRUPT_ATU_ERR
18
#define CYGNUM_HAL_INTERRUPT_MCU_ERR
19
#define CYGNUM_HAL_INTERRUPT_DMA0_ERR
20
#define CYGNUM_HAL_INTERRUPT_DMA1_ERR
22
#define CYGNUM_HAL_INTERRUPT_AA_ERR
23
#define CYGNUM_HAL_INTERRUPT_MSG_ERR
24
#define CYGNUM_HAL_INTERRUPT_SSP
25
#define CYGNUM_HAL_INTERRUPT_RSVD_26
26
#define CYGNUM_HAL_INTERRUPT_XINT0
27
#define CYGNUM_HAL_INTERRUPT_XINT1
28
#define CYGNUM_HAL_INTERRUPT_XINT2
29
#define CYGNUM_HAL_INTERRUPT_XINT3
30
#define CYGNUM_HAL_INTERRUPT_HPI
31
The data passed to the ISR is pulled from a data table
(hal_interrupt_data)
which immediately follows the
interrupt vector table. With 32 interrupts, the data table starts at address 0x8084.
An application may create a normal C function with the above prototype to be an ISR. Just poke its address into the
table at the correct index and enable the interrupt at its source. The return value of the ISR is ignored by RedBoot.
Memory Maps
The RAM based page table is located at RAM start + 0x4000. RedBoot may be configured for one of two memory
maps. The difference between them is the location of RAM and the PCI outbound windows. The alternative mem-
ory map may be used when building RedBoot or eCos by using the
RAM_ALTMAP
and
ROM_ALTMAP
startup types in
the configuration.
NOTE: The virtual memory maps in this section use a C, B, and X column to indicate the caching policy for the
region..
X C B
Description
- - -
---------------------------------------------
0 0 0
Uncached/Unbuffered
0 0 1
Uncached/Buffered
0 1 0
Cached/Buffered
Write Through, Read Allocate
0 1 1
Cached/Buffered
Write Back, Read Allocate
1 0 0
Invalid -- not used
1 0 1
Uncached/Buffered
No write buffer coalescing
1 1 0
Mini DCache - Policy set by Aux Ctl Register
1 1 1
Cached/Buffered
Write Back, Read/Write Allocate
Physical Address Range
Description
-----------------------
----------------------------------
0x00000000 - 0x7fffffff
ATU Outbound Direct Window
0x80000000 - 0x900fffff
ATU Outbound Translate Windows
0xa0000000 - 0xbfffffff
SDRAM
0xf0000000 - 0xf0800000
FLASH
(PBIU CS0)
0xfe800000 - 0xfe800fff
UART
(PBIU CS1)
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