Microsemi SmartFusion2 - Figure 113 Memory Map after Esram Remap (64 KB Esram)

AHB Bus Matrix
UG0331 User Guide Revision 15.0 226
7.1.4.1 eSRAM Remap
The AHB bus matrix supports remapping the eSRAM address space into code space that Cortex-M3
processor can use. Both eSRAM blocks can be remapped to appear at the bottom of Cortex-M3
processor code space as shown in the preceding figure. The amount of space available to
Cortex-M3 processor as code space depends on ECC as indicated below:
• When ECC is ON, the two eSRAM blocks (64 KB) can be remapped, but ECC sections of eSRAM (8
KB) cannot be used by the Cortex-M3 processor.
• When ECC is OFF, the two eSRAM blocks (64 KB) can be remapped, and the ECC sections of
eSRAM (8 KB) can also be used by the Cortex-M3 processor. These 8 KB are available at a different
address.The resultant memory map is illustrated in the following figure.
Figure 113 • Memory Map after eSRAM Remap (64 KB eSRAM)
In default mode, the Cortex-M3 processor firmware boots from eNVM. However, as shown in the
preceding figure, it is also possible to get the firmware to boot from eSRAM by re-mapping eSRAM to
location zero. Code shadowing is supported to facilitate this.
Memory Map of
Cortex-M3 Processor
Memory Map of System
Controller, FPGA Fabric
Master, Ethernet MAC,
Peripheral DMA
FPGA Fabric FIC Region5 FPGA Fabric FIC Region5 0xF0000000 - 0xFFFFFFFF
0xE0000000 - 0xEFFFFFFF
DDR_0 Space 3 DDR_0 Space 3 0xD0000000 - 0xDFFFFFFF
DDR_0 Space 2 DDR_0 Space 2 0xC0000000 - 0xCFFFFFFF
DDR_0 Space 1 DDR_0 Space 1 0xB0000000 - 0xBFFFFFFF
DDR_0 Space 0 DDR_0 Space 0 0xA0000000 - 0xAFFFFFFF
FPGA Fabric FIC Region4 FPGA Fabric FIC Region4 0x90000000 - 0x9FFFFFFF
FPGA Fabric FIC Region3 FPGA Fabric FIC Region3 0x80000000 - 0x8FFFFFFF
FPGA Fabric FIC Region2 FPGA Fabric FIC Region2 0x70000000 - 0x7FFFFFFF
0x60100000 - 0x6FFFFFFF
AHB-to-eNVM_1 Registers AHB-to-eNVM_1 Registers 0x600C0000 - 0x600FFFFF
AHB-to-eNVM_0 Registers AHB-to-eNVM_0 Registers 0x60080000 - 0x600BFFFF
eNVM_1 eNVM_1 0x60040000 - 0x6007FFFF
eNVM_0 eNVM_0 0x60000000 - 0x6003FFFF
FPGA Fabric FIC Region1 FPGA Fabric FIC Region1 0x50000000 - 0x5FFFFFFF
Peripheral bit-band
alias region of Cortex-M3
processor
0x44000000 - 0x4FFFFFFF
Peripherals (BB View) 0x42000000 - 0x43FFFFFF
0x40410000 - 0x41FFFFFF
Cache Back door 0x40400000 - 0x4040FFFF
0x40044000 - 0x403FFFFF
{
USB USB 0x40043000 - 0x40043FFF
0x40042000 - 0x40042FFF
Ethernet MAC Control Ethernet MAC Control 0x40041000 - 0x40041FFF
0x40039000 - 0x40040FFF
SYSREG SYSREG 0x40038000 - 0x40038FFF
(63 K space
allocation
for devices
outside MSS)
0x40030000 - 0x40037FFF
Config DDR_1, PCIe_0, PCIe_1, etc. Config DDR_1, PCIe_0, PCIe_1, etc. 0x40020400 - 0x4002FFFF
Config DDR_0 Config DDR_0 0x40020000 - 0x400203FF
0x40018000 - 0x4001FFFF
RTC RTC 0x40017000 - 0x40017FFF
COMBLK COMBLK 0x40016000 - 0x40016FFF
CAN CAN 0x40015000 - 0x40015FFF
High Performance DMA High Performance DMA 0x40014000 - 0x40014FFF
MSS GPIO MSS GPIO 0x40013000 - 0x40013FFF
I2C_1 I2C_1 0x40012000 - 0x40012FFF
SPI_1 SPI_1 0x40011000 - 0x40011FFF
UART_1 UART_1 0x40010000 - 0x40010FFF
0x40007000 - 0x4000FFFF
Fabric Interface Interrupt Controller Fabric Interface Interrupt Controller 0x40006000 - 0x40006FFF
Watchdog Watchdog 0x40005000 - 0x40005FFF
Timer Timer 0x40004000 - 0x40004FFF
Peripheral DMA Control Peripheral DMA Control 0x40003000 - 0x40003FFF
I2C_0 I2C_0 0x40002000 - 0x40002FFF
SPI_0 SPI_0 0x40001000 - 0x40001FFF
UART_0 UART_0 0x40000000 - 0x40000FFF
FPGA Fabric FIC Region0 FPGA Fabric FIC Region0 0x30000000 - 0x3FFFFFFF
SRAM bit-band alias region
of Cortex-M3 processor
0x24000000 - 0x2FFFFFFF
eSRAM_0/eSRAM_1(BB View)
0x22000000 - 0x23FFFFFF
0x20014000 - 0x21FFFFFF
ECC eSRAM_1 ECC eSRAM_1 0x20012000 - 0x20013FFF
ECC eSRAM_0 ECC eSRAM_0 0x20010000 - 0x20011FFF
Cortex-M3 Processor System
region
eSRAM_1 eSRAM_1 0x20008000 - 0x2000FFFF
eSRAM_0 eSRAM_0 0x20000000 - 0x20007FFF
0x10000000 - 0x1FFFFFFF DDR_0 Space 0(Mirrored) 0x00080000 - 0x1FFFFFFF
Cortex-M3 processor code
region
0x00180000 - 0x0FFFFFFF
e N V M ( F a b r i c )
Virtual View
0x0007FFFF
Visible only to
FPGA fabric
master
0x00100000 - 0x00170000
eNVM (Remap View)
0x00010000 - 0x000FFFFF
0x00000000 - 0x0000FFFF
eSRAM0 and eSRAM1 (Mirrored) 0x00000000
}
{