Comtrol eCos - Manual (Page 253)

Chapter 5. Installation and Testing
-b < addr>
Location to store command line and environment passed to kernel
-w < time>
Wait time in seconds before starting kernel
-c "params"
Parameters passed to kernel
< addr>
Kernel entry point, defaulting to the entry point of the last image loaded
Linux kernels on MIPS platforms expect the entry point to be called with arguments in the registers equivalent to
a C call with prototype:
void Linux(int argc, char **argv, char **envp);
RedBoot will place the appropriate data at the offset specified by the -b parameter, or by default at address
0x80080000, and will set the arguments accordingly when calling into the kernel.
The default entry point, if no image with explicit entry point has been loaded and none is specified, is 0x80000750.
Interrupts
RedBoot uses an interrupt vector table which is located at address 0x80000200. Entries in this table are pointers to
functions with this protoype:
int irq_handler( unsigned vector, unsigned data )
On the malta board, the vector argument is one of 22 interrupts defined in
hal/mips/malta/VERSION /include/plf_intr.h :
#define CYGNUM_HAL_INTERRUPT_SOUTH_BRIDGE_INTR 0
#define CYGNUM_HAL_INTERRUPT_SOUTH_BRIDGE_SMI 1
#define CYGNUM_HAL_INTERRUPT_CBUS_UART 2
#define CYGNUM_HAL_INTERRUPT_COREHI 3
#define CYGNUM_HAL_INTERRUPT_CORELO 4
#define CYGNUM_HAL_INTERRUPT_COMPARE 5
#define CYGNUM_HAL_INTERRUPT_TIMER 6
#define CYGNUM_HAL_INTERRUPT_KEYBOARD 7
#define CYGNUM_HAL_INTERRUPT_CASCADE 8
#define CYGNUM_HAL_INTERRUPT_TTY1 9
#define CYGNUM_HAL_INTERRUPT_TTY0 10
#define CYGNUM_HAL_INTERRUPT_11 11
#define CYGNUM_HAL_INTERRUPT_FLOPPY 12
#define CYGNUM_HAL_INTERRUPT_PARALLEL 13
#define CYGNUM_HAL_INTERRUPT_REAL_TIME_CLOCK 14
#define CYGNUM_HAL_INTERRUPT_I2C 15
#define CYGNUM_HAL_INTERRUPT_PCI_AB 16
#define CYGNUM_HAL_INTERRUPT_PCI_CD 17
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