diff options
Diffstat (limited to 'arch/arm/mach-uniphier/lowlevel_init.S')
| -rw-r--r-- | arch/arm/mach-uniphier/lowlevel_init.S | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/arch/arm/mach-uniphier/lowlevel_init.S b/arch/arm/mach-uniphier/lowlevel_init.S index 66cad42ddeb..5936045e866 100644 --- a/arch/arm/mach-uniphier/lowlevel_init.S +++ b/arch/arm/mach-uniphier/lowlevel_init.S @@ -44,59 +44,6 @@ ENTRY(lowlevel_init) bl enable_mmu -#ifdef CONFIG_UNIPHIER_SMP -secondary_startup: - /* - * Entry point for secondary CPUs - * - * The Boot ROM has already enabled MMU for the secondary CPUs as well - * as for the primary one. The MMU table embedded in the Boot ROM - * prohibits the DRAM access, so it is impossible to bring the - * secondary CPUs into DRAM directly. They must jump here into SPL, - * which is run on L2 cache. - * - * Boot Sequence - * [primary CPU] [secondary CPUs] - * start from Boot ROM start from Boot ROM - * jump to SPL sleep in Boot ROM - * kick secondaries ---(sev)---> jump to SPL - * jump to U-Boot main sleep in SPL - * jump to Linux - * kick secondaries ---(sev)---> jump to Linux - */ - - /* branch by CPU ID */ - mrc p15, 0, r0, c0, c0, 5 @ MPIDR (Multiprocessor Affinity Register) - and r0, r0, #0x3 - cmp r0, #0x0 - beq primary_cpu - /* only for secondary CPUs */ - ldr r1, =ROM_BOOT_ROMRSV2 @ The last data access to L2 cache - mrc p15, 0, r0, c1, c0, 0 @ SCTLR (System Control Register) - orr r0, r0, #CR_I @ Enable ICache - bic r0, r0, #(CR_C | CR_M) @ MMU and Dcache must be disabled - mcr p15, 0, r0, c1, c0, 0 @ before jumping to Linux - mov r0, #0 - str r0, [r1] - b 1f - /* - * L2 cache is shared among all the CPUs and it might be disabled by - * the primary one. Before that, the following 5 lines must be cached - * on the Icaches of the secondary CPUs. - */ -0: wfe @ kicked by Linux -1: ldr r0, [r1] - cmp r0, #0 - bxne r0 @ r0: Linux entry for secondary CPUs - b 0b -primary_cpu: - ldr r1, =ROM_BOOT_ROMRSV2 - ldr r0, =secondary_startup - str r0, [r1] - ldr r0, [r1] @ make sure str is complete before sev - sev @ kick the secondary CPU -#endif - bl setup_init_ram @ RAM area for temporary stack pointer mov lr, r8 @ restore link |