Physical Address Generation Using Tlb Entry With Size = 00B (Section) - Texas Instruments OMAP5910 Reference Manual

DSP Memory Management Unit
Figure 29.

Physical Address Generation Using TLB Entry with Size = 00b (Section)

DSP virtual address
Physical address tag
31
Section base address
74 DSP Subsystem
3) Reads the corresponding physical address tag from the TLB entry.
4) Checks the access permission bits.
5) Generates a corresponding physical address by using the physical
address tag and the page index (taken from the virtual address).
The number of physical address tags and virtual address bits used in this
step depends on the size field of the TLB entry. Figure 29 through
Figure 32 illustrate how a physical address is generated from the physical
address tag and the page index.
If the access permission bits do not allow the type of access being requested,
the MMU generates a permission fault and interrupts the MPU core. An
interrupt is also generated if no matching virtual address tag is found and the
table walking logic is disabled (translation fault).
23 20 19
21
Section base address
20 19
Physical address
Page index
10 9
0 0 0 0 0 0 0 0 0 0
Page index
0
0
0
SPRU890A