/* If this CPU supports segmentation, hook up the helpers */
#ifdef P1SEG
+/*
+ [ P0/U0 (virtual) ] 0x00000000 <------ User space
+ [ P1 (fixed) cached ] 0x80000000 <------ Kernel space
+ [ P2 (fixed) non-cachable] 0xA0000000 <------ Physical access
+ [ P3 (virtual) cached] 0xC0000000 <------ vmalloced area
+ [ P4 control ] 0xE0000000
+ */
+
/* Returns the privileged segment base of a given address */
#define PXSEG(a) (((unsigned long)(a)) & 0xe0000000)