arm-trusted-firmware

History

Antonio Nino Diaz 4e85e4fd11 Initialize secondary CPUs during cold boot The previous reset code in BL1 performed the following steps in order: 1. Warm/Cold boot detection. If it's a warm boot, jump to warm boot entrypoint. 2. Primary/Secondary CPU detection. If it's a secondary CPU, jump to plat_secondary_cold_boot_setup(), which doesn't return. 3. CPU initialisations (cache, TLB...). 4. Memory and C runtime initialization. For a secondary CPU, steps 3 and 4 are never reached. This shouldn't be a problem in most cases, since current implementations of plat_secondary_cold_boot_setup() either panic or power down the secondary CPUs. The main concern is the lack of secondary CPU initialization when bare metal EL3 payloads are used in case they don't take care of this initialisation themselves. This patch moves the detection of primary/secondary CPU after step 3 so that the CPU initialisations are performed per-CPU, while the memory and the C runtime initialisation are only performed on the primary CPU. The diagrams used in the ARM Trusted Firmware Reset Design documentation file have been updated to reflect the new boot flow. Platforms ports might be affected by this patch depending on the behaviour of plat_secondary_cold_boot_setup(), as the state of the platform when entering this function will be different. Fixes ARM-software/tf-issues#342 Change-Id: Icbf4a0ee2a3e5b856030064472f9fa6696f2eb9e		9 years ago
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default_reset_code.png	Initialize secondary CPUs during cold boot	9 years ago
fwu_flow.png	FWU: Add documentation for Firmware Update feature	9 years ago
fwu_states.png	FWU: Add documentation for Firmware Update feature	9 years ago
generate_reset_images.sh	Introduce the ARM TF reset design document	9 years ago
non-sec-int-handling.png	Document design of the Interrupt Mangement Framework	11 years ago
psci-suspend-sequence.png	PSCI: Add documentation and fix plat_is_my_cpu_primary()	9 years ago
reset_code_flow.dia	Initialize secondary CPUs during cold boot	9 years ago
reset_code_no_boot_type_check.png	Initialize secondary CPUs during cold boot	9 years ago
reset_code_no_checks.png	Initialize secondary CPUs during cold boot	9 years ago
reset_code_no_cpu_check.png	Initialize secondary CPUs during cold boot	9 years ago
rt-svc-descs-layout.png	Add EL3 runtime services and SPD documentation	11 years ago
sec-int-handling.png	Document design of the Interrupt Mangement Framework	11 years ago