Motorola PPC/PMC-8260/DS1, Reference Manual, Page: 94 / 150

Code Examples Firmware
4 - 30 PPC/PMC-8260/DS1
Code Examples
This section contains C code examples which can be implemented into your driver
software to enable communication between the host and the PPC/PMC-8260/DS1
firmware via the PCI bus.
It assumes that the PowerSpan II PCI bridge has been fully initialized by the host’s
PCI enumerator and is accessible. The code printed in bold at the beginning of the
data definitions may require some modification to your host environment.
Data Definitions
/* some compatibility macros (e.g. for vxWorks) */
#define UINT32 unsigned int
#define sleep(s) taskDelay(s*sysAuxClkRateGet())
/* Set this if host is big endian */
#define BIG_ENDIAN_HOST
#define LLSB(x) ((x) & 0xff)
#define LNLSB(x) (((x) >> 8) & 0xff)
#define LNMSB(x) (((x) >> 16) & 0xff)
#define LMSB(x) (((x) >> 24) & 0xff)
#ifdef BIG_ENDIAN_HOST
#define LONGSWAP(x) ((LLSB(x) << 24) | \
(LNLSB(x) << 16)| \
(LNMSB(x) << 8) | \
(LMSB(x)))
#define NOLONGSWAP(x) (x)
#else
#define LONGSWAP(x) (x)
#define NOLONGSWAP(x) ((LLSB(x) << 24) | \
(LNLSB(x) << 16)| \
(LNMSB(x) << 8) | \
(LMSB(x)))
#endif
/* Required PowerSpan Registers */
#define PSPAN_MBOX(num) (0x00 num*4)
#define PSPAN_ISR0 (0x00000410)
#define PSPAN_IER0 (0x00000418)
#define PSPAN_INT_MBOX0 (0x00000001)
#define PSPAN_IMR_MBOX (0x00000420)